Don’t you think WB would’ve tried to have a real family? He had one with Big Mam(who was also a pirate) and she got pregnant with Bonney.
Soon enough, a Tenryubitto ship showed and a certain tenryubitto took the pregnant Big Mam as his wife. WB returned only to find his wife and unborn child missing and returned to his pirate life to start a new family after he couldn’t locate them(Don’t forget that Yasopp had a wife n’ child but left them behind to continue piracy. WB probably did something like that).
This could be the reason WB has no female fighters on his ship. The abduction/disappearance of his first family made him overprotective. WB always says “Son.” Never daughter or children.