I'm imagining it's going to bite these people on the backend later in life when they sacrificed everything for their careers and potentially missed other major life milestones: cultivating a relationship, starting a family, etc. I know not everyone spends 6 months getting into Google, but there are so many other companies that will take you without 6 months of preparation. If career is the only thing that gives you meaning in life, sure, but I'd rather not put all my eggs in one basket.
I used to think that until I heard of people with far less experience than me getting paid $400k total comp at these places because they can ace the interview and get competing options. That's worth putting 6 months of work in.
Yeah, once you're in, it's cushy, for sure. But that's not the full story. You're likely going to have to move to the bay area to make $400k kind of money. Are you willing to forego living near family, friends? Plenty of people do, but time gets more valuable when you have less of it left.
For one thing 6 months is definitely the high end of prep time. Even so, spending your evenings studying for one 6 month period in no way precludes you from ever dating or marrying or having children.
This is anecdotal, but most of the people I know at Google and other FAANGs did not spend that much time preparing for their interviews, if they even bothered to prepare at all...
