for example if you see the exited founder that can’t perform - they won’t start perform again or at least soon. if you see someone with huge amount of money but that can’t perform - they will never will. some failing “friend” and you help them - they will never recover because of you and they would abandon you any time they start a new life without old problem. most people can’t be successful second time, it is very rare so it doesn’t make sense to work with such people. you see someone with decent skills - they won’t handle the pressure of a startup. always bet on best performers that is within your orbit.