if porn is banned then there's no regulation for it, meaning when people inevitably set up illegal porn sites things like child porn and abuse are not off the table and will be much easier to find than right now. unless of course you want to implement mass survailance to make sure nobody's watching, which is a violation of our human right to privacy.
It's like that for many vices such as alcohol- it's harmful but banning it is much worse than regulating it (see the history of 1920s America). I'm not convinced porn consumption is harmful but even if it was, it shouldn't be banned.
My siblings in Christ just because you have an unhealthy relationship with porn doesn't mean that everyone else does too. Stop projecting your problems into pathologizing everyone else.