This question makes it hard to believe you’re of adult age. Just about any adult should be able to imagine reasonable circumstances in which they could make “six figures” and still struggle to (e.g.) make rent.
So we're not talking about responsibility anymore, you're moralizing on people's life choices. There's no way to responsibly live in SV without being already rich.
Now, if you can get into a remote position, awesome, but I could see living in SV or NYC or similar and feeling middle class pangs at low 6 figures.