Why there are so few support mains

1. The least potential to carry a game. (Don't even try to argue otherwise)
2. Very little fun things to do (Soraka/Janna stay behind and protect for the first 15 mins, thresh/blitz try to hook once in a while. There's nothing that requires constant attention, it's a laid-back laning phase for supports most of the time)

These two core problems with the role make it the least played. They've been around since the game began but now they're prominent because of autofill in higher elo.

I'd like Riot to address these issues to make the role for appealing to players.