First risk factor for being in jail for violent or sexual crime is... being a cis man. Like 98% of those crime are committed by men in most countries. Society should think about why those number are this high.
I think access to porn can be a catharsis. Saying the thing in fiction can prevent from doing it in real life: that's a principle that was know even in ancient Greece. There were also some experimentation by associations in France with people attracted to minors to just let them access loli porn and it helps them keep control.
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Also because of the taboo, people can't ask for help (or they would be send to jail), so that's prohibition which favor acting out and repeat offense.