>One can simply be bored without it being a pathology.

yes but the point is that the people who doom-scroll cannot be bored, boredom is exactly what they want to avoid.

People who constantly have their phone in their hands often want to avoid boredom because when you're bored your mind wanders and you have to encounter in silence, your own thoughts. Which now a lot of people are uncomfortable with.

Just like people who overeat sure you can brute force yourself to stop doing it, but you're going to have much more success if you understand why you're engaging in an unhealthy habit, what you're trying to suppress, and then what you want to do instead. People struggle to break bad habits, and sustain changes when all they have is a reactive attitude of "I don't want to do it".