Fair enough. Then they can go to medical school. Or law school. Or be an accountant. Or an investment banker. They could take up the trades (electricians, plumbers, carpentry). Maybe help animals--be a Veterinarian. Work on the dark side...be a mortician. Be an airplane mechanic or a civil engineer. Dispense drugs...be a Pharmacist. Build bridges and buildings.
Something tells me they will find an excuse for why any and all of those options presented are not options to them. They are professional complainers.