I also think this why immigrants are eating locals' breakfast (so to speak). I do a lot of hiring & (very anecdotally of course) burnout is almost exclusively a topic of developed countries' software engineers. So much so, that I don't like hiring them (DACH region/Austria/Germany lately). And yes; I believe work life balance is important.
The difference is just that the livelyhood of sometimes dozens of people back home is on their shoulders, so they just try to power through.
Which company do you work for so that I can avoid it?
Yes, burnout is a rich country problem, because you otherwise kill yourself at the task because you can't afford not to. Give Vietnam western european wages and within 10 years, burnout will also be a talked about problem. Just because you don't have time to look at something doesn't mean it doesn't exist.