Yes, that was my point.

And here it is, evolving before your eyes: we're killing off the maladaptive mutant which was "opt-in by default". That's the evolution that is happening here.

That would not be evolution, that would be an attempt at creationism. There is no evolution police, and never will be.

Selection pressure is the evolution police.

It would be fair to compare it to selective breeding, rather than natural selection. The flip side of rejecting usage is promoting neologisms. We can do both things deliberately, I see no rule saying that language is only allowed to evolve naturally. A reasonable criticism would be that trying to change it on purpose makes for a lot of unnecessary fuss, but we can be moderate about it.