I considered many of the same points you mentioned.

Though, one area I am still struggling to grasp is the harm that governments are trying to mitigate. If a child were to see inappropriate material, then what harm can truly arise? Also, why do governments need to enact such laws when the onus of protecting children should be on their parents?

I am not trying to start any kind of flame war, but I really cannot see any other basis for all this prohibition that is not somehow traceable back to Western religious beliefs and the societies born and molded from such beliefs.