I think that you are looking at this all wrong, more complicated than it is. I just don't like scams, many maximalists don't like scams either. Almost all altcoins are premined scams. It is as simple as that.
Although one argument against it is that we don't welcome innovation.
Is not that we don't welcome innovation. We are against any supposed upgrade that's going to affect Bitcoin primary ethos
Which many altcoins sacrificed to perform what Bitcoin can't.
Besides this too of course.