Honestly , I think people will misjudge me when I say this , but these reasons are the reason why I am frugal.
My economic condition can change drastically , it just depends on the market , how is your "friend" entitled to 150-200K ? Because of our "expectations" (Amazon , google are the best companies so "best" + phd , phd means you are in academia so more "smarter")
But our "expectations" are now changing , mine certainly changed , but instead of panicking (because lets be honest? whats the point of panicking?)
We can try to be frugal. We can try to live in a way where my salary doesn't really matter that much , I can live off of any salary but the only difference b/w big salary and low salary might be the fact that your savings increase which you invest in things like index funds (boglehead investing) and the only difference it makes is on what age you can retire (thus , being a point on ageism)
I might also think that after a age , person can get a little less ambitious and more rigid , so more flexibility early on (in mid 30's) can be absolutely great but for that you need good saving habits / being frugal in your 20's.
I also believe that frugality is sometimes seen as not being ambitious or I live life only once and for that I have to say that I agree , I am frugal mostly because I have seen / just feel this tingle for spending money where my mind .
Of course , you don't have to be frugal over like a $ , but just changing your mindset & hobbies from being materialistic to non materialistic and being satisfied .
What I personally can't be is a frugal who constantly switches / worries about light bulbs / appliances just to save 2 cents or people who don't eat outdoor to save money (unless its in literally 5 star and I also believe that going to dine in full time also sucks , I just like to eat burgers , pizzas , chips etc. but some people can be really that level of frugal .
I just want to have a decent life reading good books with emergency funds and funds invested. I would try to maximize my income , but I wouldn't chase it as my ultimate goal , the ultimate number.
I might earn less but if I am working on one of my passion ideas on some company , I am down.