pointing out how someone's mother's last name is just their grandfather's last name ignores the point the person was trying to make in favour of going "well akschually".
a woman who feels more connected with her mother and prefers her last name over her father's last name has made that decision based on her emotions associated with her family relationships. And it was a choice she had to make against the default way surnames are given.
people rarely do things like going through lengthy legal processes to get the necessary paperwork to change your last name for shit and giggles. Instead of "well askchanelyling" people's choices, think a bit on why they made that particular choice, or you could also ask them
you could swap the subject of criticism with "the devil" in any sentence and it would be the same though?
"the devil (covid-19) caused a pandemic"
"the devil (billionaires) is pushing more people into poverty"
"the devil (adhd) is making me procrastinate doing the dishes"
"the devil (you) has really weak criticisms of feminism, since if only he read about it, he'd realise he can see and feel the effects of the patriarchy everywhere. and the way he talks right now makes me believe he only knows the concept from strawman memes"