That's not a universal truth. Studying medicine in Europe is not significantly more expensive than studying history, CS or whatnot. E.g., in Belgium, any year

That's not a universal truth. Studying medicine in Europe is not significantly more expensive than studying history, CS or whatnot. E.g., in Belgium, any year spent studying at college- or university-level costs €550 (±$720), plus the cost of the books. If your parents earn less than a middle class income, you pay significantly less. The major difference that does hold true everywhere, is the fact that doctors start earning a salary much later.