In general though, GC means automatic memory management which is effectively a kind of dynamic memory safety.
This is often more apparent (though a rampant problem nonetheless!) in policy decisions. Like how KOSA is supposed to "protect kids online" but what it mostly does as written is train people to get their identities stolen while making websites even more cumbersome than they already are. If I think it's a dumb bill, someone might say "What, you don't want kids to be safe?", as that's actually a lot of the point of calling it that
If they don't know anything specific, then it's pretty safe to say "Well, there are some differences in the languages, and you might choose one over the other for performance or ecosystem reasons, but they're both pretty safe overall. You probably don't need to worry too much about it, TBH."
I chose this example as I assumed it would be clear and non-controversial enough to make my point, ie., I assumed most HN readers would appreciate that a person claiming Rust's memory safety model made it safter than an interpreted language would be a person clearly deeply confused about the meaning of any of these terms.