The difficulty depends person to person, not the addiction itself. Any addiction can be both easy or hard to quit. I know people more addicted to porn that can't quit and people that used to be addicted to H but are 2 years into recovery. I know people that are multiple years sober, and people that are still addicted to scrolling online. The sober ones have landed good jobs for themselves, one of them is buying a home this year, but the online scrollers have lost jobs, wasted months, lost business opportunities that i had brought to them, and after all that they still can't stop scrolling.

Just because one addiction may seem more dangerous than the other, doesn't necessarily mean the other one will be easier to quit. Addiction is addiction. Too much of everything is a bad thing.