There's a massive difference between "quit the industry", as in "leave it forever", and "work another job to support yourself until an opportunity to fly comes up once again". I strongly suspect that most pilots who lost their jobs this year belong in the second category. They fly commercially because there's nothing else they'd rather do for a living, not because it would be impossible to achieve the same or greater income by putting enough effort into something else.
Most of those in the first category were about to leave for good sooner or later either way simply because they didn't enjoy flying. COVID was their final trigger to act on it. And there's nothing wrong with that - there's no reason to keep forcing yourself into working a job you don't like. It's equally miserable for you and those around you as nobody likes being locked up in a flight deck the size of a phone booth with someone who's frustrated about having to be there. You've only got one life and you'd better try and spend your time this side of the grass on something you actually enjoy.