Raise thoughtful, moral children. They are going to see porn in our modern society. How they process it has to do a lot with the tools they have to do that. That’s the parents job. Not to pretend a 100% prohibition or firewall can be erected, but to raise resilient children who can thrive and not become irreparably damaged by the things they are exposed to in the world they grow into.
Recognition that they will come into contact with it also does not mean you have to endorse it or present them with it. It’s not a binary thing. Choose how you want to parent and observe the results of different approaches. YMMV.