It's more complex than that. For one thing the current porn industry does have some ethical issues. Even people not opposed to pornography per se have issues. But beyond that, the zealously anti-porn crowd isn't just Christians. It's something of an unholy alliance -- you have more than a few ultra-woke, a smattering of the Q crowd type, and of course the good ol' fashioned core of Catholic and Baptist types. Plus no doubt some others.