You make that sound easy, but I see the situation as symmetric. For example, my wife grew up wealthier than I did - and when it came time for us to buy a car, her first question was "how big a car would we need to comfortably move our family around" while mine was "what's the most affordable?"
it's a completely different mindset - she is frustrated that I default to a poor mindset and I am frustrated that she defaults to a rich one. Neither one is easy to switch.
You say that like everyone else isn't doing the exact same thing. Being privileged is all about playing the "get everyone else's approval" game. But coming from a different social context it's even more basically a way of showing others respect and earning their trust, so it's not without consequence.
If you’re totally financially independent you’re more free to do what you want, independent of class behavior expectations (or even in contradiction of them). They no longer matter that much (unless you’re doing something that requires politics or people).