Healing received: why don't we have this stat already?

Why isn't Blizz adding this really simple to understand stat?

As a tank, I'd like to know how much my style requires from the team (I'm a hammer-happy Rein main).

As a support, I'd like a simple way to show the "no heals" whiner that he got 5k healing in 3 pushes and he's just feeding

As a dps I want proof that the healers are not healing ME, so that I can spam heal diff in chat.