Doctors are no worse off than any equivalent professional career in fact better paid than many. My occupation of Civil Engineering, I was professionally qualified. There were high flyers and there were the also rans. I paid my fees to the institution. I negotiated my own salary and bonuses, never went on strike and was happy in a career which was fulfilling, often very long hours in dirty and wet conditions designing and building bridges and tunnels for road and rail infrastructure.
My salary peaked at 60k odd a few years before I retired in 2017 and I live on a pension equivalent to an average family income. Looking at the pay scales for a five year resident doctor in early thirties they seem reasonable to me in comparison today.