i find it kinda laughable when people use speedrunning as a mark of the game's quality. like yeah this niche group of players that rarely represents even 1% of a game's playerbase that plays the game often in ways explicitly unintended by the devs is a real mark of the game's quality and not just like, a sign of its popularity.
speedrunning is at best something you can accommodate in the game and not something you build your game around. celeste functions because it makes all its difficult technicalities approachable and readable, but a lot of its speedrun tricks offer little to no feedback to the average player and thus aren't expected tech for the average player to learn.
even sonic games that are entirely (at least nominally) about going fast are accommodating the speed experience to the more average player. speedrunners aren't playing the game regular style and are functionally useless for game design feedback in almost every instance.
