People with a given disability that needs relatively specific design aren't going to be all that common either, and yet many of the components or techniques which would address their difficulties are commonly useful to everyone.
The question should be less of "Is X population large enough to require changes?" and more, simply, "Would these provide benefit more than worth their cost?"
Having the occasional hurdle by which to prompt or reinforce learning, and generally centralize at least a modicum of competency as an expected norm, does not amount to "enforcing how to play the game".
In any other game, even other MMOs, it'd be called "a well-crafted difficulty curve" -- precisely the way any game provides ramps and bridges to being able to enjoy said game more deeply or in novel ways. Only here do we seem so eager to mislabel such as oppressive or forceful.