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!”
My dad threw a party to celebrate when I graduated university with a degree in Computer Science.
At the party, my dad’s friend took me aside and said “My nephew just got a degree in electrical engineering. Now that’s an up and coming field, you should get a degree in that.”
Like, alright buddy. Hopefully that career pays well enough for another four years of student debt. I’m still kinda in shock at how dumb of a thing to say that was.