IMO bot wins=game win is too simplified. Winning does not come down to just 2 people.
When I play(ed) bot it usually goes one of two ways
- It's a constant clown fiesta bot lane. Both tops TPing in, mid ganking, jungle ganking, constantly more than 2 people on a team down there past a few minutes into the game. The one who gets the most ganks inevitably wins because they get the tower, map pressure, and dragon.
- No one touches bot lane and it really is just a test of 2v2 skill. (rare)
I think most people are talking about the first one when stating that games seem to come down to a simple "did bot win?" question. I don't think did bot win is the right way of putting it, because you also have to factor in ganks from mid, jungle, and possibly even top. If you have a competent jungler doing well then it's more likely that bot will win. Same thing with mid and top. If you have competent players on your team who are supporting a lane and causing it to win, then of course you are going to win.
This being said I hate that bot is just a clown fiesta. Nothing tilts me more than a malz coming mid every 1.5 minutes and a WW ganking every time hes in bot side jungle.