Overwatch is a team based game why isn't it treated as such?

Starcraft and diablo have in game clan support, world of warcraft has guilds. Why doesn't Overwatch have a similar functionality? I think that would drastically improve the enjoyability of this game. Imagine an added clan competitive mode where you can only join as a full team under your clan's name. Each clan can have it's own SR and you have to work as a team to climb the ranks.

The way I see it, the one complaint I and many others have about this game is that when you queue into competitive most of the time you're solo queueing in a competitive team based game. There's little to no organization compared to the competitive pro scene. If we had clans you could practice together and it would be 100% team vs team, no solo queues in the clan competitive mode. I think I'd like that. Then people would try harder to get recruited in the regular competitive modes, show they are a team player and all that.