When have pornographers even attempted to market to children?
The government allowed unrestricted marketing of new coke and now the only drink we can purchase is new coke? Oh right, it was rejected even though it had the greatest marketing push in history.
Your thesis is that select criminals with an exclusive monopoly on violence are the people best positioned to manage everyone's life? Google Democide, governments have killed between 175 and 200 million of their own people in the 20th century, excluding wars; It's based on their policies. If you include wars, WWI and WWII weren't caused by businessmen....they were the natural outcome of government.
I'm happy to let you believe in your personal Jesus of government but the data are on my side and I only ask that you allow me to opt out.