intentionally limiting who can experience the art you’re trying to share with the world
Almost every musician, painter, or sculptor ever has done that. It is ok.
You don’t HAVE to include more than the basic colorblind option
I think most devs could include stuff like colorblind options or rebindable control schemes and such, and I definitely think they should
better products for it
Difficulty is not the same as colorblind mode. Colorblind mode is the same as creating closed captions for movies, difficulty is the same as changing the movie to fit another audience. Difficulty is part of the game.
it COULD be a better game if they did
It would be a different game, that they are not trying to make.