You yourself recognize porn is an "easy option". Then no wonder people for whom it is hard to successfully form relationship that would lead to sex use it. It's like saying "cars are bad because it's too easy to just drive 100km instead of walking the same distance", ignoring the fact that for many people walking 100 km is either completely impossible or massively harder. That doesn't mean cars make you unable to walk (though in some very extreme cases it could happen). It means some people that previously had no options, now at least have this inferior one.