I would disagree with you about aggressiveness in the Wall Street collapse/mortgage crisis -- the problem there is that everybody was making so much money on buying and selling "stuff" that they forgot to properly evaluate the true worth of what they were buying and selling.
Read "How the Mighty Fall". Almost every corporation studied by Collins (based on hard data, instead of subjective supposition that dominates most "leadership" discussions) which collapsed in fact hired "dynamic" and "risk-taking" CEO and ended up collapsing faster, because the issue is that it is the "undisciplined pursuit" of new goals that destroys great companies and organizations.
Discipline is what you need to succeed in business, just the same as in war, and it's not a popular viewpoint simply because nobody wants to be the quarterback who has the discipline to do his drills 100 times without complaining instead of the guy who keeps doing spectacular touchdowns that do not necessarily win the game.
So in hindsight at least in WWI you had a stodgy old non risk taking General Staff who executed the plan because it was the plan and in WWII you had a national leader who was willing to repeatedly bet the house on high risk operations and in both cases the result was disaster for the people and the regime.
The Schlieffen Plan was in fact extremely high-risk, betting everything on an early and immediate defeat of France. The Moltke Plan (defeat Russia first, then France) was more disciplined and saner - and in practice what really happened. Albeit the sanest plan was really Bismarck's and the lowest risk - keep Russia an ally so no two-front war happens in the first place.
The First World War was not an example of generals being very timid and traditional; that's again the British period drama version. Even the French army, derided for its antiquated uniforms, had a commander who regularly and ruthlessly sacked any General who showed timidity or refusal to adapt under fire. Their war plan moreover was in fact extremely aggressive and risky - an immediate offensive into Germany ("Don't worry about the machine guns and fortifications, our men can cross the battlefield in under 20 seconds because of elan and bayonet the machine-gunners!") so that they could get back Alsace-Lorraine.
In fact the only major army that wasn't sending its army into a suicidal grand offensive was the British, as John French and his British regulars knew everyone was insane for thinking you can charge machineguns or even riflemen in entrenchments. And French was the first of the army commanders to get sacked for timidity and lack of nerve, to be replaced by Haig whose first grand offensive (which they were so sure would work, thanks to better technology) resulted in 60,000 casualties on the first day of the Somme. And ironically, Haig's best British subordinate - Plumer - was the oldest of the British Generals, known for having extremely limited and disciplined objectives, and was the only British Army commander to consistently take ground while minimizing losses (his Aussie and Canadian counterparts showed a similarly disciplined approach and were consistently derided by Haig, who wanted his "aggressive" cavalry commanders like Gough to shine)
The problem in fact with all sides is over-confidence that the new repeating rifles, machine guns, and artillery would allow for immediate and hugely successful offensives - despite no data to support this and that all small-scale conflicts just prior to the war showed that attacking was often near-suicidal at the tactical level without crushing artillery superiority.
This is in fact a prime example of the "undisciplined pursuit" Collins talked about. Rather than figure out how to properly use these new technologies, everyone bet the farm on machine guns, artillery, and bolt action rifles winning the war for them in weeks. When that failed, everyone kept doubling down on their stupidity - insisting that they could win if the governments could just send them another million more shells - instead of acknowledging that the military solution was going to be bloody and largely pointless.
Ten million lives were lost because a continent was too proud to admit that war in fact would not be quick and relatively cheap; and that it would be long and drawn-out just as it always had been. Really, people forget that people entered the First World War more enthusiastic and jingoistic than they were in the Second, and that the continent was (justifiably) brimming with overconfidence because they had advanced technologically and economically so quickly from 1850-1910. It's just the persistent "Tank rendered trenches obsolete" myth that was perpetually parroted by British historians to excuse their bad performance in 1940 that causes this jilted version of the narrative to become the norm when it in fact is very far from reality.
Meanwhile, the German Panzer Corps of 1940 was in fact a highly developed force. It was created out of a stunningly disciplined, incremental approach that somehow managed to evade the inter-arm rivalries that plagued all the other tank forces. The view that Germany's inherent "warlike" skills being responsible for the Panzer arm evaporates the moment one realizes that the direct ancestor of the Panzer Corps was not infantry, cavalry, or even artillery. Instead, the Panzer Corps was born from the Weimar Republic's motorized supply transport Corps - the only Weimar Army unit allowed to have any vehicles under the Versailles treaty - and it was the discipline and dedication of this small unit that allowed Germany to go from having "zero tanks" to having the first "tank army" when the Versailles Treaty was repudiated.
Really, again, think about it - the fearsome Panzer Divisions were born out of units which, in Guderian's words, were supposed to "haul flour". Does this sound like an arm that's all about daring charges and offensives; or one whose ultimate background was simple, disciplined logistics?