Bauer wasn't banned because of what he allegedly did at the time:
1. Bauer was banned because he's a prick and he's universally hated; when he was accused and being investigated, he attacked baseball. Meanwhile, someone like Marcel Ozuna and Urias have committed terrible acts but they've shut up, been good little soldiers, and were admitted back into the game.
2. Bauer faces 3 other accusers currently. Could it all be BS? I mean, I guess but this really is a reflection of what an asshat this guy is.
I've said this before but baseball, generally speaking, is a conservative game; players lean towards being conservative, leadership certainly is, and politically speaking Bauer is not an outsider. He's just such a d-bag that the only friends he ever makes around the game are guys like Clevinger.
Both Clevinger and Bauer might not be woman abusers (they also very well might be, as where there's smoke often times there are fires in that world), but they're shitty human beings even beyond your typical rich-prick standard.