YC combinator is in the startup business, so of course PG is going to oversell the case for startups.
PG's stuff is hit and miss. Here's an example of a much better article by him:
Don't Talk to Corp Dev
Successful startups require people who will do things that people who naturally gravitate towards big companies just aren't interested in doing. If you take someone (like me) who likes structure, regiment, and routine and idolizes people like Raymond Chen and put them in a key role in an early-stage startup, that's a recipe for a) the startup failing miserably, and b) the employee ending up on suicide watch.
It's in the business interests of startups to filter for those who would actually enjoy working at one, not to pressure the rest of the world into thinking they need to work for one.