Apply this to everything not just your day job. People who know how to fix things that break, improve things like their house, fix their car, their neighbor's fence, etc tend to be more well rounded. Doing physical labor should be below nobody. Buy nice things and make lots of money, sure, but also make sure you work with your hands from time to time. This helps me stay grounded and humble. I think many people could use this advice.

FWIW I work as a SWE at a FANG, presumably a "high or upper middle class" job.