Precisely.
Porn destroys the values of restraint and deferred gratification without which civilized life is impossible.
And as I have argued elsewhere, to ignore the moral preconditions for democracy is idiotic. Pornography destroys those moral preconditions. Caesars happen when a moral, responsible citizenry has been turned by a depraved, sadistic popular culture into a "bread and circuses" mob.
Porn is an inanimate object. It cannot destroy values or harm morals, any more than guns can kill people.
People destroy values and morality through their actions. Tell me, how does a consenting adult viewing or reading pornography in private in any way harm the morals of society?