I seem to recall some numbers that the differential value of a college degree is actually highest outside of STEM. Can't seem to find them again, but would be interesting to look at.
It makes sense if you think of it from the "negative" side: how do you fare looking for a job without a degree? If you are looking for tech jobs, a degree is valuable but you can still get a good job without one: CS degrees are not required for all tech jobs, not even all six-figure tech jobs. The incremental value of being a programmer vs. being a programmer with a degree is positive but modest.
But if you are looking for non-tech jobs without even having a liberal-arts degree, then you are effectively hosed. All those mid-five-figure white-collar administrative jobs in a typical Fortune 500 company are filled by people with liberal-arts degrees. Why? Because companies find it a useful filter. Not perfect, but better than nothing: if you want to select for "likely to be a decent employee, show up on time, follow directions, write English sentences coherently", and you have 50 applicants with degrees and 50 without, you just pick someone out of the 50 who have a degree.