Careers can make people suicidal bc they have too much stress (and stress-factors) and can't handle it anymore - this applies for min-wage jobs and up to manager positions. The other thing is if a career fails and there's a massive decline as a result - life quality, financials, problems that weren't problems become big problems.
I did not go the way of a typical career in my life there were several ups and downs but form the last down I never recovered - failed in life (especially financially) which is the cause I have to consider CTB. Age and other factors prevent a satisfying recovery.