that doesn't really make sense, star trek is an automated, post scarcity, mostly peaceful world, serving in the star fleet isn't a mandatory military service where they have to accept almost anyone or people signing up for a paycheck because there's nothing else to do. burnouts and misfits have no place there, they either don't pass the initial assessments or get filterd out through evaluations later, they don't need to be there if they have no motivations to do so