Has any woman even won a tournament that men competed in?
I hadn't heard about Siming Chen before so I watched one of her match on YT and she can definitely play. Great patterns. good composure, great ball-pocketing skills. She has it all. Definitely the best woman I have seen (haven't seen a lot of them to be fair)
But besides the break, what's the reason a woman has never won a men's tournament(if so)? Pool is not tough physically and I certainly don't think they lack to stroke power to execute any shots that the men do on a regular basis.
Karen has won a few Joss tour events ("men's" events). This is very impressive stuff. However, to win an event like that she only has to beat a few very top pros, unlike a major where there are world beaters at every turn.