XIV EW Job-Gameplay is Terrible... Why?

[NYCLouisGamer]

I mean if we adhered to a “classic trinity” design then thematically the WOL couldn’t be a healer or tank which would ruin the entire MSQ

But virtually all other MMO games also have your main character as the "hero", regardless of role. Yet, they still are able to keep the classic trinity design. The fact that a Warrior can heal at all (outside of potions) screams single-player.