>I net enough to pay off the mortgage, so I’m doing that, which will leave the entire household debt-free and cut our expenses drastically

The lead seems buried here. This isn't someone quitting, this is someone in a position of incredible privilege, essentially retiring (or at least going on "funemployment" for a little while).

There are far darker ways to make far less money, that are far more worthy of dramatic storm cloud drawings. Maybe once they see past their burnout they'll realize how incredibly privileged they were to even accomplish what they were able to (working remotely no less!) in the first place. Burnout really is a sad and scary thing.