I think that's a bit unfair on female Labour MPs pinkquartz. Off the top of my head, there seem to be some talented women in Labour, although most of them aren't in the shadow cabinet:
Powell, Onwurah, Cooper, Phillips, Reeves, Creasy, Nandy, Champion, Abrahams, Kendall, Dodds (I'm sure there are more).
I wouldn't necessarily see them as PM material, but I think they'd be good as shadow ministers. I'd also include Angela Rayner. I really don't agree with some of what she says and she'd be a terrible PM, but I admire her for her background and she can certainly hold her own in a debate.