Arts degrees have huge analytical and intellectual rigour but very few practical skills for any vocation. Obviously this is gonna hold you back coming out of uni, but note that it is much better than the other way around. You can fix a lack of skills with work experience and more vocational qualifications for what you want to do in the future; but the ability to argue and reasons the humanities provides is obviously indirectly useful in anything you should wish to do.
STEM is also a myth. There's a select few courses that will get you a lot of money, however your average science degree ala biology and chemistry seem to have distinctly average starting salaries. If the maths and abstraction (there is coincidently hugely more abstraction in philosophy than biology) gives you a premium among employers, then the difference in monetary gain in different STEM fields should surely be more pronounced.