FAANG jobs stack rank you against people working 60+ hours a week who are desperate to keep their visas. You might not be technically required to work those long hours, but if you want to keep your job, you have to, unless you're an absolute rock star. It's not "work ethic" driving those long hours. It's fear.
The hyper-capitalist notion that anyone who only wants to work 40 hours a week lacks work ethic is perverse. Jeff Bezos, for example, is proud of his Original Thought that there is "no such thing as work-life balance".