I don't know the specific cause. However, as such, it is a moral issue, not a religious one per se. Pornography is abusive and incredibly damaging to individuals and society and thus the common good. It is entirely reasonable even for governments to take measures to restrict or ban the production and sale of such content.

Opposition to such measures often hinges on false notions of freedom and the purpose of law. One function of law is to teach men to be free in the genuine sense, not as being able to do what thou wilt, but to be able to do what you ought.

There's a reason pornography has a history as an instrument of wartime psyops.

> false notions of freedom

Like freedom from want and freedom from fear, Mr. Roosevelt?

I think grouping all porn as exploitative is a stretch.