I don’t think so. Working in tech with many busy people, I say “hop on a call”, but only in “let’s sync live, it’ll be faster” situations.

This stuck out to me as rude. I would never say that to someone on my team who expressed serious concerns, far less than this person quitting after years of dedication.

I would offer an apology, explanation, and follow up questions to understand more in public, then say I’m happy to set up time to talk privately if they would like to or feel more comfortable.