However, I'm not talking about _addiction_, but messing with the dopaminergic system. It's, I'd say a specific kind of "pleasure" with particular mechanisms to trigger.
The problem here is not that a person "is not having control over doing, taking or using something to the point where it could be harmful to them" (https://www.nhs.uk/live-well/addiction-support/addiction-wha...). The problem is that the reward system gets broken. If a person is actually addicted to instagram scrolling, like people are addicted to smoking, it just adds another layer of complexity. As I observing from myself, "checking stuff on my phone" looks like a bad habit rather than an addiction.