I am South African, which MAY be relevant, I'm not sure. Also pushing 50...
Growing up, I don't remember being made to shake hands with adults when I was relatively young. I don't think it was standard for girls? I'm not sure.
I do remember, age 19, a male friend of mine from home came up to my uni town for a festival with a couple of HIS male uni friends and they all came to meet a bunch of us somewhere. All the "boys" were shaking hands and introducing themselves and I was just ignored (for some reason I was the only girl I think? Or maybe the others faded into the background, I don't remember) and so I stepped forward and pointedly stuck out my hand.
It was so weird as I honestly am not sure I'd EVER shaken someone's hand before that, ever. But somehow I just instinctively realised how batshit this was.
Me and DD talk often about the lack of female characters in books/tv etc and quite frankly, I am happy to let her watch the ridiculous YouTube fan fiction stuff with Disney princesses etc as usually its female dominated and they're all strong, independent etc. DD also knows that if there's any kind of discrimination at school, I've ALWAYS got her back. eg when one boy kept touching her face becuase she had a skin tag. I spoke to the teacher, teacher was suitably concerned. It kept happening. I told DD to shout next time and she said, "but we're not allowed to shout, I'll get into trouble" and I told her that if that happened she doesn't need to worry because I will rain down hell on the school. She didn't, but she did subsequently practice and deploy a killer roast on this child. Bizarrely, they're now friends?!
Similarly, I am "that" parent. The one who wants to know why the girls football club doesn't use the nice facilities and is cancelled more often. The one who complained to the school when the girls who wanted to play football were discouraged by all the boys telling them they couldn't. My view is that a) if I don't fight who will and b) I want my children to look back and know I walked the walk as well as talked the talk.