nobody force you to be a doctor, an engineer, or an architect, or a chief.
But how many of these professions are asking you to pay to work? none.
You mean except for the large student loans, years of university study, and constant examinations paid for by employees themselves in retaining curreny experience as a doctor, architect, engineer?
Get real - everyone faces some training costs - it is simply a matter of people being too willing to pay costs themselves that ensures the high training costs in this industry.