The problem is that many STEM majors are not the kind of STEM workers there is a demand for. In my country a big share of people who have a CS degree barely know how to write real code. I think it's because 1. the education is too theoretical 2. free education system (no barrier means a lot of people who study without having any real interest in programming).
2 seems unlikely. If education is free, why not learn what ever you want? If educate is insanely expensive then unless your family is rich, you have to try and make sure what ever you study can recoup those costs.
Because people don't know what they want to do so they just jump on any education. I've been there. It's so easy to start university that literally everyone does it and what you actually read is secondary.
In fact, many people choose bogus courses like "hat science" just to get study allowance and access to the other benefits. So it's not surprising people pick CS thinking "it's good money so why not".
