I think what OP is asking is: what would the value of a foreign medical degree be outside of the practice of medicine.
OP, if that's what you're asking, I don't think it would be worth much. Ask yourself what a US MD degree is worth without a residency. The answer is, not all that much. You could use it to help you get a job teaching in high school, or maybe as an instructor in a college, but you could get those jobs with a bachelors degree. You might get a job in industry, but an MD from a US school with no significant additional scientific background, you're not that attractive to industry. If that MD is from Poland, it will be worth even less.
If you went to medical school in Poland straight from high school, then your degree might be worth even less than a bachelor's degree here. I'm not sure how anyone would view it. A regular employer might see you as over-educated for a regular job, so it might be worth less than nothing.