>>35087861because, first of all, they're like the designated non-type. normal type is pretty much equivalent to no type at all. also they're all pale shades of brown, black or pink, which are very boring-looking colors
a lot of them look like lazy cartoon versions of regular real world animals (toucannon, komala and herdier are some of the best examples)
and the worst thing is it's not SE against anything and NVE against rock type
if you're gonna play with normal types you might as well drop the 3ds and the games and go walk your dog and pretend it's a pokemon