Can someone from the dev team tell me why we can't just have all of the maps in the ranked RM map pool and we let the players decide what they want to play?

Also let me choose what maps I want in my map pool. Some people will have a harder time playing on certain maps but the best maps will always have available players to match with. Why are we letting you choose for us, especially when you choose wrong so much of the time.

Edit: I see that it would exponentially increase queue times, thanks for the explanation. I still wouldn't mind if they got more input from players when choosing maps for the map pool.