Why?

[Rein_eon_Osborne]

[...]Also, from my experience, it's usually the healer damage that really makes a difference, since a lot of healers barely do damage. DPS are always focused on doing damage, tanks mostly focused on doing damage, but healers often spend more GCDs on healing than you need to--or in general just being more scared of dying.

This speaks more about general player skills within the role than anything tbh.

When you (general you) create a job designed to be playable by a toddler faceplanting their keyboard, I don't think it's a surprise that they will attract players of similar types one way or another.