I wonder if that same analogy applies.
You couldn't "individually experiment" because fundamentally you needed team experimentation; you can't play Reinhardt in isolation, and subjecting your team to experimentation on your own whims leads to toxicity.
I think many people who go down the "I should be able to play what I want and people should adapt to me" don't realize they are being selfish in play style in a game like Overwatch.
Overwatch is a different, less flexible game now, closer to what I think most people thought Overwatch was, and apparently wanted. It is what it is.
To put it another way, the game was unique in combining meaningful teamplay and meaningfully distinct characters. I'm not saying you're necessarily wrong to say that's an inherently toxic point in the design space, but it's pretty tragic if that's true, because those both seem like good things that you want a game to have.
See also this video about why it's considered rude to suck at WoW: https://www.youtube.com/watch?v=BKP1I7IocYU