Guild Wars 2

It always confused people as to why ANET didn’t nerf the horribly imba celestial for so long. And when they finally did they nerfed only things tangential to it. Like the might nerf that hurt everything else more than cele builds.
Basically it forced other builds that might stacked to be subpar and made celestial the only viable choice by pushing the rest out of the meta.

It is almost like nerfing a boon like stability to push the bunker guards out of the meta to make space for our new hybrid overlords. Oh wait they totally will do that!

Revenant and celestial:
1) Hybrid type damage, more pressure than burst check.
2)Strong sustain via condi removal or boons check.
3)Good team support check.

tl;dr They loved the celestial so much they made it into a class.

Anets seems to like versatile professions that can fit into few roles at the same time. That’s nothing new honestly, after all, the first unveiled profession was an elementalist who was suppose to change roles while swapping attunements. Celestial is just a tool for those professions to exist.