i never got the idea that he meant everybody is singing kumbaya in some kind of unified chant.
modding either is free or it's not. if it's not and the system becomes profitable, then, it will fundamentally change. period.
and, those aspects that he thinks will change for the worse are very logical beliefs.
if those are pro-paid mod arguments, i'm pretty sure i don't need to read em to have an idea of what they will exactly be, since, these issues have been discussed with other "products" for years, decades and centuries.
in fact, let me just say this real quick- as a guy who's seen a lot of the great mods out there, the quality is already great, availability is widespread with ease and the cost is free.