For a game where difficulty is based on reaction time then it is accessibility.

This describes literally any action game.

It’s a little bit pathetic actually when all people are asking for is a slider

And I’m telling you, sliders are not always structurally viable to the game or efficient for the developers to implement. By your arguments here, what do you want? A literal speed timer that slows down the entire game? Should Super Mario Bros. have had an easy mode that runs the game at half frame rate?