How is banning your employees from getting jobs with competitors aligned with a free market? That's the opposite of a free market: it prohibits me, the worker,

How is banning your employees from getting jobs with competitors aligned with a free market? That's the opposite of a free market: it prohibits me, the worker, from choosing a company that I want to work for. If I can't get a job with a company I agree with because I'm under a noncompete (perhaps the incentives aren't good enough anymore) then I'm kind of fucked, huh?