Artillery doesn't advance in the context of the movement war of 1914. For the trench war, maybe, but you don't hold ground with artillery, you need corps (with infantry and artillery to support them).
Actually it did and that what served the Germans so well, namely that they had really big guns (the 155mm howitzer, the 170 mm Minenwerfer, the 210mm Mortar as well as the 310 mm mortar) they could either move as horse-teams (all up to the 210 mm mortar) or transport by truck and assemble quickly (the 310mm mortar).
Your view is also a bit simplistic:
Sure, artillery cannot hold ground, but then neither can infantry
without artillery.
And nobody, or at least not me, is arguing for just artillery, but an infantry formation with ample artillery support is much more able to do pretty much anything whether it is holding ground or taking it. And the Germans started the war as the only nation with 'heavy field artillery' which i suppose means heavy guns that could actually be moved instead of having to be constructed and deconstructed to get into action.
Also, and it's more Moltke than Schlieffen, the german troops on the left were more important than in the original plan, and were planned to do a counter offensive against the french assault in Lorraine (which they did, but they couldn't advance as much as planned afterwards), and as such, flank by the south. Some say it might have been a mistake of Moltke to reinforce his left too much to counterattack and not concentrate more forces on his right, but I doubt that the Schlieffen could have worked anyway.
I think this is another mistake in thinking that i see often:
Schlieffen-Plan was an utopian plan. It would have worked had everything gone right.
It makes sense to plan that why, but it also important to realize that it was, as far as Germany was concerned, more a statement of intent than a prediction or expectation how the war would go.
Even in 1870 the Germans had spent 3 months in front of Paris after the campaign had gone remarkably, while Schlieffen is very silent about what would happen if and when the German Armies reached Paris.
Given that peace had not been sought last time that happened it seems unlikely the German General Staff assumed that they just had to take Paris and the french would pack up and capitulate.
And for the intent of a plan of operation Schlieffen worked very well.
They swept through Belgium into France, were 'beaten' in a battle were they suffered 20% less losses than the supposed victors, then leisurely 'retreated' towards their ideal defensive position and pretty much stayed there for the Rest of the war.
Unless we assume that France could have been hit hard enough in 1914 to quit the war i think what the germans got in 1914 was best solution they could hope for.
@casualty figures:
Pan H said:
As for Western Front losses, I'm finding numbers of : Entente 3,600,000 to 4,000,000. Germans : 3,300,000 to 3,700,000.
I assume that is wounded + missing+ wounded, because German barely had in excess of 6 Million killed and wounded at all fronts.
But even then it seems unlikely that Germany would have suffered 2/3 of their casualties on the Western Front.
I find numbers of about 670.000 German war dead to nearly 2 million Allied dead (France 1,18 Million; UK 622.000, Belgium 24.000, USA 85.000) and 1,2 million wounded Germans for 5,5 million wounded Allied (3,5 mio for France, UK 1,8 mio, USa 240000).