I see you make this argument all the time and it's a really frustrating case of "what-aboutery" that would embarrass even the Soviets. Yes, Spain being able to hold in-land Mali was probably even more unlikely than a successful Moroccan colonization attempt, but pointing this out is meaningless. The people who want Morocco to colonize only in a very small subset of games where it gets very lucky probably also want Spain to hold in-land Mali in an even smaller subset of games as well. The reason you probably see more people complaining about the latter rather than the former is because most people in this forum come from European backgrounds, and frequently Anglo-Saxon ones, and usually only have in-depth knowledge on a small array of nations and only then from the perspective of the orthodoxies of that European background. If they were as well-informed about Mali as you were and possessed the same interest in Mali you did, they probably would point out how implausible it is for European nations to hold inland African provinces too. Saying "Spain can go into Mali, therefore let's allow all other implausibilities because w/e" is just such a terrible argument.
The people who want Morocco to stay Muslim and Spain out of Mali have also been spotted:
1. In support of 15 year truces.
2. In support of large coalitions of majors forming over small conquests by minor powers on a consistent basis.
3. Supporting fleet rights somehow not extending colonial range.
4. In support of the 25% autonomy, reform requirement, and most of the other double-digit horde nerfs, including them not getting new units.
5. In support of Timurids breaking to rebels (you see this all the freaking time, so much for realism).
6. Okay with starting TI and tech group balance in the first place (if it didn't exist the way it does, we wouldn't need the arbitrary westernization concept)
Speaking of westernization, what the heck is that supposed to represent? You can't even get a consensus on that question, and yet people are still arguing over who should be doing it and whether it's realistic in a game where you can't perform historic actions without ahistoric reactions...or in some cases you can't perform historic actions outright. Not just plausible...you can't do it at all. But when THESE issues get pointed out, poof goes plausibility in a cloud of smoke and suddenly it's all about gameplay again, with the sole criteria as to what's plausible and where you cut that off resting on the player's own knowledge, biases, and preferences for gameplay.
Now, this isn't all players, but generally it's an eyebrow raiser in the first place when a game stated to be "risk on crack" is touted as adhering to historical plausibility as patches have routinely and forcibly deviated the game from historical plausibility in the ostensible name of gameplay. If it makes you feel better you can always just pretend westernization just means that they improved their processes and tech better...after all, that's what's happening. It's not like Morocco can get Napoleonic square, neither can Bengal. Really, if you want to change anything about it, make the modernizing requirement fit into the game more sensibly...but don't advocate for the AI not to do that and only that (or a select few other things) while perfectly accepting 15 year truce timers, because that's asinine. Count it as my own biggest gripe with the game; even the devs fall prey to this trap, and it leads to absurdities like Wiz's "hordes should reform or die" statement when there's hard evidence of every horde that made it late into this time period (and several that didn't) actually getting new units (IE their infantry shot stuff with guns).
I think the obvious implication of someone complaining that the AI is Westernizing too often is not that they want the AI to play badly but rather that Westernization is too easy. There's not really any need to explicitly point this out unless you're feeling particularly self-righteous.
Without it, the AI becomes even more of an ahistorically easy walkover. I supposed you could just buff the heck out of the tech groups instead, to the point where Chinese is like 20-30% or something if you prefer that route :/.
Am I against AI nations westernizing? No. Am I against a game that consistently diverges wildly from historical plausibility for the period 1444 to 1820? Yes.
In saying this, you are actively stating that
you are against the core design of EU IV. With that being the case, it's nonsensical to target any one consistently ahistoric element, especially one that occurs much less frequently and has much less end impact on the player than others (such as truce length).