Rare is the western world tech worker without kids or debilitating illness who can not easily retire early.
https://www.mrmoneymustache.com/2012/01/13/the-shockingly-si...
Similar formula behind other get-wealthy motivational writers: Sell lots of books to people who gobble up get-wealthy motivational books, and collect royalties for life.
MMM is Personal Finance Porn: A story of one guy's very lucky and privileged life path, not generalizable to everyone else's situation even though it's sold as that.
[1] using a very flexible definition of "no"
You have to be willing to curtail your consumption, which gives a double effect (lets you save and invest more and you need less from those investments).
Not everyone wants to do that, but that means they won’t retire early.