Why are you placing such importance on dehumanization and objectification then? If it's on the whole a net positive, then why complain about porn in general? If you just want to remove the specific negative effects of dehumanization and objectification, then why complain about porn in general instead of trying to isolate the specific causes which give rise to those things?
--
You're messing with me! You're messing with me, aren't you!?
You're making fun of me, aren't you!? Aren't you!? You definitely are! I'll murder you!