Because you're applying a definition of freedom so absolutely and narrowly that it ceases to be useful.
Assault being illegal increases my freedom because I can freely walk down the street without threat of harm.
Prohibiting outside doors from being locked in a factory increases my freedom as a worker to leave whenever I choose.
And theoretically at an absolute minimum any time you see a prisoners dilemma regulation is how you prevent it and make sure that everyone gets their preferred outcome.
If your definition of freedom can't explain why voluntary enslavement makes people less free then it's useless.
Assault being illegal increases my freedom because I can freely walk down the street without threat of harm.
Prohibiting outside doors from being locked in a factory increases my freedom as a worker to leave whenever I choose.
And theoretically at an absolute minimum any time you see a prisoners dilemma regulation is how you prevent it and make sure that everyone gets their preferred outcome.
If your definition of freedom can't explain why voluntary enslavement makes people less free then it's useless.