It is a matter of prudence in governance. For example, we may permit prostitution (without sanctioning it) if we find that banning it will lead to worse state o

It is a matter of prudence in governance. For example, we may permit prostitution (without sanctioning it) if we find that banning it will lead to worse state of social affairs (e.g., society "convulsing with lust", as Aquinas wrote when writing about this very topic). It can be argued that the tolerating of prostitution is actually as such preferable to the toleration of pornography. Point being, because it is a matter of prudence on the part of civil authorities, I am not claiming that people have the right to these things as hedonists are wont to claim.