No, but driving a car or possessing a gun does. Different solutions for different issues is hardly a contentious proposal.
Are cars or guns regulated because of addiction? No. So GP compared porn to sugar, which is considered addictive and has probably more concrete evidence of self-harm than porn. I think the comparison is apt? Certainly fairer than comparing porn to driving a car or gun possession, which is sort of absurd.
But in terms of addiction potential alone Utah already has precedent in legislating for that. Example: Utah doesn't allow minors to purchase alcohol because of its addictive nature.
Some of the aspects of the porn market are not great, but they should be investigated by the relevant authorities. Hiding them from only certain people won't make them go away.