1. The number of fields allowing a new grad to get a six-figure job are very small.
2. The number of places offering the above while also allowing the new grad to live in an area where they can have a sub-$2k/mo footprint are incredibly limited.
3. Of the people who are actually able to take advantage of the above, the majority of them will have no interest in doing so. For every highly-compensated employee at Google living in a van in the parking lot there are several in houses they can't afford with credit card and student loan debt to boot.
4. Gaining financial independence for the sake of gaining financial independence is sort of a pointless goal.
My guess is if you collected every person in the US who retired by the age of 30 and removed those who inherited money, won the lottery, and started a business, you could fit them in in a single large room.