And they're much more different than you might think. Lets be clear. Drug addiction is mediated either directly through effecting incentive salience via dopaminergic agonism, or, indirectly through glutamergic agonism as reward eventually training incentive salience. There's no need to actually enjoy the drugs, they just directly effect the reward prediction system and alter wanting and so behavior.
Very clear causation. Very clearly outside of human volition.
Now you have screens and sounds. Very clearly not effecting incentive salience directly. Very clearly not effecting glutamergic agonism (in the shell of the nucleus accumbens) directly. The only mechanism of action would be through the person actually finding the experience enjoyable repeatedly and learning to anticipate this real enjoyment. Just normal human experience. No more 'addictive' and damaging to ones life than the random interval operant conditioning of recreational fishing, and probably much less expensive.
Very abstract causation with a very weak effect. Very clearly not ouside of human volition.
And, btw, gambling disorder was grandfathered in (there are no non-substance addictions in the DSM or ICD as your article highlights at the start). Repeated calls for, and instantiations of, working groups in the DSM and ICD have covered these 'media addictions' and found the medical support wanting over and over the last 20 years. Much like uncategorizable gambling disorder would be rejected if considered these days with modern medical standards and understandings. Most of the support for these concepts come from commercial groups that profit off "treatments". It's very similar to the "gay conversion camps" model in terms of political advocacy without scientific support. But the memes for "dopamine screens" and the like have raged like wildfire among the uninformed which gives such evil for-profit groups a seeming gleen of legitimacy they definitely do not have.
If it was not clear from me addresing the points of the linked paper above, I did read the Philosophical Transactions B paper (a very low tier journal for any biology subject). In this review paper they collect a random assortment of other studies to try to say gambling disorder people's brains are similar to drug addicted people. If you've read it (then I don't know why you linked it) but you'd know they come away with no solid conclusions beyond one: gambling disorder people often have drug problems too. This does not support your argument in this context.
I recommend you check out some of the lay review articles coming out of Kent Berridge's lab: https://sites.lsa.umich.edu/berridge-lab/publications/