This is probably the root of most of tech's angst: people thinking they're entitled to get rich just because they made /run something.
If you can live comfortably doing something as rewarding as making something like Lichess, what more can you really want? People are talking about FU money/financial independence, which I agree is nice, but you can totally get there on $58k/year by living below your means and investing.
The reason I say it leads to angst is when you expect more than a comfortable salary, you're imposing a higher financial burden on the overall system than necessary, which can sometimes work in the short term, but in the long term introduces drag on development/stability because those extra thousands you're personally socking away aren't going towards, say, getting a contractor to address little issues or going into the rainy day fund.