i hope you're not implying glitches are not a legitimate thing to use in competitive games because then you're literally discounting the entirety of capcom's combo system in 2D fighting games (and probably a lot of other company's games too; anything with cancels as a function) since 1991
edit: i also realized that would kill a lot of interesting mechanics that aren't even related to combos in said games as well soooo yeah
edit: i also realized that would kill a lot of interesting mechanics that aren't even related to combos in said games as well soooo yeah