What point are you making in relation to the topic at hand?
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.
The reward of lotto tickets is a function of cost with the current approach, but that’s the wrong point to get wrapped around the axle. Consider instead that if the lotto reward is funded by taxes. The point is the risk/reward profile gets skewed.
As an aside, I’m pretty sure you can find evidence that excessive gambling is a net negative.
Lastly, I’m not sure you made any case that pornography is relatively safe.
I assume no - it's just a ban on sinful behavior.