I doubt very many STEM majors have a lot of trouble paying back their school loans, no matter what color God made them.
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74% of STEM graduates cannot find work in their own field. The Cheap Indian Labor Express ensures this.
This does not mean they can not find productive and good-paying careers.
I started, with a Ph.D. in Chemical Engineering in 1972. My first job was doing research on manufacture of fuel for nuclear reactors -- pretty close to chemical engineering.
Second job was development for a company that made electrically conductive polymers -- getting a little further afield.
Retired 13 years ago from a major aerospace company where I was a project manager in their optical sciences department. Not much chemical engineering in there.
But, I accumulated 20 patents over the years, chemical, mechanical, electrical and optical engineering. So lets just say a STEM career can be rewarding even if it isn't in your own field.