I'm surprised this is sustainable for CDPR, to be honest. They've had a reputation for a long time as being a crunch heavy studio, and it seems as though they're getting worse for it over time. I wouldn't be surprised if experienced developers wouldn't touch them no matter what salaries they offered, meaning they need to hire more and more less experienced staff to fill the gaps... who they then make crunch, burn out, worsen their reputation and then have to hire even more people. It's only going to get worse, probably. Can't imagine a seasoned lead or even senior staff member wanting to touch them.
Pretty much every major developer is this way sadly. It's pure madness and smacks of incompetent management setting unrealistic targets but like I said it is pretty much everywhere. It is no wonder burnout is a big deal.
From my experience, they aren't all this way. You hear about the worst of it, and rightly so, but working in games isn't the guaranteed death march you hear about at some major studios. The issue is largely management related though; most studios tend to have heads who worked through the less corporate times of game dev in the late 90s and early 2000s and did insane crunch as if there was no other way to do it. Some of them then take the attitude of "it didn't kill me, so it's fine", while others take the attitude of "never again". There's plenty of studios with the latter approach and a positive studio culture is pretty high on the agenda for many studios these days.
The games industry can be pretty mercenary, with people switching companies quite frequently for better pay, benefits and increased seniority. As a result, among experienced staff, bad experiences travel far and wide pretty fast. Once you have a decent network of colleagues and ex colleagues, it's pretty easy to ask someone "what was it like working at x/y/z?". Which can contribute to the potential situation above; experienced developers being hard to hire for those studios.
The difficulty, I think, is landing a role early on in your career that doesn't stink in order to build those contacts in the first place.