Mathematics is as close to "humanities" as the STEMs get in terms of compensation and employment options for PhDs, and even top 10 mathematics PhDs can make 2x in the private sector with at least 2 years fewer opportunity costs.
Basically the only fields where what you're saying is true are the humanities and social sciences, but those aren't expanding programs or cost centers.
Work-life balance is one of those things that you would think would better in academia, but is often actually not.
The broader point is that outside of R1, prices mostly reflect the fact that for most students education doesn't scale very well and experienced human labor is more expensive than ever. Those are self-reinforcing, for obvious reasons. Case-in-point: the would-be educator who can't afford a 200k pay cut because of the loans they took out for their own education.