Really, there's no profession you could go into these days without facing these issues as a woman. It's going to be a bit of a battle no matter what. It's appalling, but not surprising when I read articles like this one.
Congrats! I think sometimes just focusing on drilling instead of PT-ing every week really helps you break into new plateu's and take off the psychological burden of "this is the PT where I'll hit x"
There is no hard line, but generally I would say that is probably too late. You would be having to fight an uphill battle, but if you crush it, then technically it is possible. But again, you are putting yourself at a significant disadvantage