Perhaps it’s only that, for the first time, they got some time to reflect on their job and actually notice the impact it had on their lives and health, realised it had never been worth it, and want to find something else?
I think it is closer to that. A lot of people were complacent in their jobs, and not nearly tapping their potential (market or otherwise). I can't tell you how many people I know or heard 2nd hand got furloughed or laid off, then landed a significantly better paying gig and never went back (sometimes wildly different industries). If they were never forced to change, I guarantee most would have stayed.
