I think we're talking past each other a bit.
I'm not discussing whether players can adapt to an environment. I'm discussing whether widening the power gap between legends and strengthening debuff-focused legends is appropriate game design in Apex.
That's why experiences with players you've encountered in a particular rank bracket or community are not directly relevant to the point I'm making.
The existence of players who successfully adapt does not prove that the environment itself is appropriate.
To use your pool analogy, the fact that some people have deliberately built up their immunity and adapted to the water does not prove that the water quality is suitable for a competitive swimming event.
I've also said before that I support necessary buffs and nerfs, but oppose excessive ones. I'm not against change itself. If anything, I support change.
What I'm questioning is not whether the game should change, but whether the purpose and method of that change are appropriate.
Silence affects more than just mobility abilities. Slows affect more than just abilities; they also impact movement mechanics shared by every legend, such as movement speed itself.
In other words, strengthening debuff-focused legends is not actually a solution to mobility inflation. If anything, it expands the problem beyond skills and into other aspects of the game.
As for the evolution analogy, I don't think it can be applied directly to this discussion. Unlike a natural environment, a game environment is artificially designed and adjusted by its developers.