And again... Almost every gear outside of AF gear shares it's look with a different role, chosen seemingly randomly. Sometimes melee and healer shares looks, or ranged and healer, or ranged and caster, tank and ranged. And the only silhouette difference between healers and casters in most cases is that casters start with gear dyed black by default and healer white... which we again can dye away.

And everyone no matter what job can glamour themselves a joke outfit like the infamous namazu roegadyn, so removing the restrictions wouldn't give us the ability to make more absurd outfits than what we already have. Having played this game for a while it is clear that the vast majority of players prefer using reasonable outfits so it's safe to say that there isn't any risk of things looking even more absurd.