Basic statistics: high banrate will inevitably lower the winrate, even if a champion is very strong

It's really, really simple: people are less likely to leave a broken champion open IF they, or someone on their team is playing a direct counterpick, OR if for some other reason they believe they have an advantage (i.e. they mained said champion in the past and know them intimately).

Anecdotal proof: I play often, so I ban almost all the time. But my buddy Mike who mains happily leaves him open, since his champion deals with easily.

It is VERY possible for a champion that has above average power to be way below 50%, if they are banned often.

I felt that this needs to be said, because I regurarly read on boards posts saying that this and that champion is "balanced", because they have < 50% winrate and are just banned in 30-45% games because are "annoying" ( looking at you ).

Simple fact is - it doesn't matter, a highly banned champion will always have a deceptively low winrate - people are obviously less annoyed if they play a counter. In fact, winrate of 48-49 percent with banrate staying above 30% is a good indicator that further nerfs are needed.