This makes sense if you're going to try to get a big payday early in your career - trying to build a unicorn startup in SV and cash out by 30. That sort of makes sense to me. But maximizing earnings by working 60+ hour weeks so you can retire at 55 instead of 65? That's a pretty high cost for not a lot of reward, as far as I can see.
There is no single right answer to that question so you need to figure it out for yourself.
Some of the answers require you to work 80+ hours a week (at a good job) while living in a tent so you can save every penny - when you finally retire at 68 you will just barely have enough money to enjoy the last 5 years of your life spending all the money you saved over the years.
Some answers you save 50% of your income until you retire at 40 to live the life you choose.
Some answers you save 10% until 65 working a 40 hour a week job.
The first allows you have an expensive hobby (sail the world in a very nice yacht). The second means you have to enjoy not buying anything. The last is a reasonable compromise for most of us.
