According to your thinking, no one can "force" medical faculties to say that now anyone can buy a surgical doctor degree for 10$, that said if you have to get urgent surgery you'll pay for the consequences as the "doctor" who'll operate won't be qualified.
This is why we need basic rules, norms and constraints that allows us to reach a better optimum than the free-for-all that you recommend. It's also a question of personal values: I value more living in a CSAM-free society, than one where pedos can watch it freely. Amishes value being in a highly religious and low-tech society than giving birth without pain or having air conditioning.
I agree that leaving the society should be possible (emigration, for instance, as the Amishes did). But each society has its local optimum, so you'll have to choose with different constraints. You can for instance go to Russia where it's legal to own and watch CSAM, but with other constraints.