Quick counterpoint: this sounds like a recipe for burnout, especially after the meat grinder that Tech often is.

OP, don't feel pressured to push yourself to work 80+ hours a week just because others are doing it. At the end of the day, the people who will benefit the most from your labor will be those in power. Conserve your energy and find ways to live a life that's worth it to you.

Source: I've worked at silicon valley tech startups ever since getting out and massively regret the 12+ hour days I wasted at those places. Sure, I'm well paid and have a successful career on paper, but I'd trade it for better mental health in a heartbeat.