But you can't take this as definitional, or this was not in good faith at all:

"This is going to sound snarky, but I'm asking genuinely:

What have men, as a group, done that is good for the advancement of women?"

It's completely disingenuous to ask that question and then go, "Haha, tricked you, it's impossible by definition because men are the oppressors!"

So presumably you are not doing that and have some independent way to define what it means to do, as a group, something "that is good for the advancement of women".

I tried to offer some examples, none of which you accepted. So since I already tried and failed to kick a goal without knowing where the goalposts were, I just want you to make clear what it is you were asking.

I mean--washing machines save a ton of labor, were created almost entirely by men, and you pivoted to complaining about women being prevented from holding patents. ?!?! Engineering household appliances and setting patent policy, in case you hadn't noticed, are generally considered rather different activities.

Anyway, if this voids the example, I need clearer definition. And the way you can show that your definition is not unreasonably strict is to show that women as a group can pass it in at least one instance.

Why is this hard?

Why can't you tell me what you think counts as doing something as a group that is "good for the advancement of women", and give an example where women as a group are doing something that is good for the advancement of women?