It seems that no one gets this. Today people want to replicate YC because "I want to get rich like they did." because for them, it is all about the money. From what I've read, PG wasn't about the money he was all about helping people realize their ambitions.
Self help types and management coaches will say "Focus on the things people need and the money will take care of itself." And for so many of us that sounds like "start walking and have faith that you'll find food and shelter along the way." The existential threat of our voluntary action resulting in our own demise, inhibits our ability to act on the advice.
On a much smaller scale, and very much closer to home for many, is the advice "Work like you don't need a job." Which is essentially do the Right thing, always, and if it gets you fired or you lose your job, that is okay because you were doing the right thing.
But the thought of "What would I do if I didn't have this job? I've got rent and food and car payments and bills, I'd be homeless and never work again!" works against this advice and so people compromise their principles or their morals or their willingness to do harm to others, because they are just doing what the boss told them to do and they really need this job.
My personal experience is that you definitely take an impact in your promotion/raise/advancement when you follow your principles an speak truth to power. I don't know that I've ever directly been fired over it but I have had some interesting conversations with senior leaders who did not appreciate having their ill-conceived choices called out. But I can assure you that if you have a moral compass and you follow it, even over the objections of people who would have you do otherwise, you can sleep better at night and you can look back on your life with way fewer regrets.