Sounds like you're not interested in making money.
I’m interested in adding value and helping make progress in the world, money is secondary, but I have plenty of money.
it's really easy to not care about money when you already have it.
Oh for sure, I grew up poor and am now on the other side. But that’s not what the author is talking about. He’s condescending to people that are making $250k/year for ”leaving millions” on the table. At $250k/year you don’t have to care about money a whole lot, and you can make that being a developer.
You missed the sarcasm, GP was agreeing with you by means of a joke.