I suspect most people with that sentiment don't have a mortgage/kids/etc. I have known youngish people who got a very nice severance package back in the day and essentially took a 6 month sabbatical. I don't really see a problem for getting future jobs so much. But it is a loss of significant income (assuming you were well-compensated even if you're still being paid something) and may not have great alternatives for income though, if you're in the position to do so, you can of course travel or whatever.
There's perhaps significantly lower total compensation and potential uncertainty. A lot of people just aren't in the position to travel the world (or whatever) for a year. Or even work on an open source project that may or may not even be within the bounds of the non-compete depending in the company.