I’ve got one STEM/CS kid and one who majored in IR. The CS kid certainly had an easier job search - summer internship led directly to a great job offer. My brothers are both in CS and survived the popping of the last CS bubble, but I’ve seen their business go up and down. The company where the older brother worked is long gone even though it was one of the leading companies in the field when he graduated.
The thing is you’ve got to do what you are good at. My younger son could never do what the older one does, though it turns out he’s better with computers than he thought he was. In a summer job he taught himself to do simple programming on Excel and that’s turned out to be a skill that he’s been able to use in his internships as well.
I think the most important skill is to be nimble and develop multiple skills. Also probably to see the writing on the wrong and know when it’s time to jump ship if your current job looks to be in danger of disappearing.
That’s why Carnegie Mellon requires CS majors to have a minor - though I think many CS majors don’t really take advantage of that and just end up majoring in something easy (for them) like math or physics.