Why do damage-keystone even exist?

I thought Champions exist todeal dmg, not some stupid keystone mastery.

The game was OKAY before keystones arrived.. it all started with thunderlords and co making leblanc and other assassins even stronger.

Why not just remove damage keystones... they are completelyy unnecessary. Like cmon.. what the fck is this comet thing. They are just there do deal even more dmg without any reason. and NO... the game is not more fun with that... utility keystone would be so much better ...

They game would also be easier to balance..