Hey, where did the goal posts go? I could have sworn they were right around here...

Anyway, no, there is no "secret, suppressed evidence that THEY don't want you to know about!!!" either. If there were strong evidence found that porn was significantly harmful, there's a fairly substantial portion of society that would never let us hear the end of it.

Porn was formerly seen as deviant, but that's changed in recent decades. Watching porn is a normal activity that many normal people engage in. Conservative, religious people don't like change, so they try to convince the rest of us that there's some great danger here. Some people (presumably you) are convinced by those arguments, and repeat them, despite not being conservative or religious themselves.

Speaking of relationships, good sex is an important component of a successful relationship. Sex is better when the people involved know what they like and are able to communicate that with each other. And it turns out that porn is a pretty effective way of figuring out what you like.

It's starting to sound like you found porn to be detrimental specifically to you. There may have been some other underlying problem that was occurring. For example, if you're not going out and socializing or doing much else because you're spending all your time watching porn, you might just be depressed, rather than actually addicted to the porn. Might be something worth talking to a therapist about.

In any case though, there's nothing wrong with abstaining from porn. If you find that your life is better without it for whatever reason, then more power to you. Just try not to generalize your own experience to everyone else, as circumstances can vary wildly.