Tragically, they also don't seem to be able to distinguish between porno and the love act established by God that is reserved solely for a husband and his wife.
As you inferred, it's difficult to have an intellectually honest discussion with 'em.
The plague of pornography addiction really needs to be discussed. It is best just to ignore the porn defenders. They are in rigid denial.
I imagine that the multi-billion-dollar porn industry has paid off academia, politicians everywhere in the world, maybe judges.
It probably has adept financiers and money-men who further profits by investing in child porn, drugs, etc.
But nobody dares touch it. So far.