I’ll go first: “You have to have children when you’re young,” told to me when I was in my late 20s, with no desire to ever have kids, and no means to support them, by someone divorced multiple times with at least one adult child who does not speak to them.
Also: Responding to “How do I deal with this problem?” questions with “Oh, don’t worry about it, it’s enough that you’re even thinking about it!”
Lol, and they said that about you with a CS degree, too? A degree that’s been famously valuable in recent years? It’s a bad enough thing to say period, but it’s extra silly when CS degrees probably make more money and have an easier time finding work.