This shouldn't still need saying in 2026 but all else being equal women are just as capable of doing anything - coding, understanding maths, running a company, training consistently as an athlete, doing science - as men are and you can't deny that and call yourself a feminist. But you also can't call yourself a feminist if you deny that everything else is not equal and the way society is currently structured women face more barriers to doing these things than men do.
@afewbugs Lewis Goodall commented on a podcast a couple(ish) years ago saying that it was almost as if women were expected to make a contribution to the econony by working but that nothing much had been done to make it manageable with having and raising kids and doing that whole side of things too. I looked open-mouthed at my phone and said out loud "have you only just realised that?" For an intelligent guy who comes from a very down to earth background I found that astonishing and horrifying.