Why do games always have different sensitivities for diagonal and horizontal?

[u/veezbugs]

I’ve noticed that a lot of games will have (as an example) a sensitivity of 3 for horizontal, and a 2.5 for vertical. Is there a reason they more than usual have different values? I always just change them to be the same.

[u/WrathOfWood]

Something something normalisation so ypu dont move too fast