I think you need a better discussion tool here.
Tiktok and the like are highly addictive for some people and the dopamine kicks are real and unhealthy.
Reading books does not give the same release of dopamine as TikTok/Instagram.. hence why most people don’t read for 2 hours a day but many people easily spend that much time on insta/tik.
Modulating behavior can cause physical withdrawals.. you don’t need a pill. I.e lovers, gambling addicts, porn addicted.
But take gambling.. gambling is considered addictive and its disorder classified in the DSM-5. (Gambling is probably also most like TikTok/Instagram in terms of activating reward seeking and pleasure in the brain). In the US we do heavily regulate gambling and some legislations have required warning labels for the risks involved with gambling.
So no, if would not be unreasonable to me if we as a society discussed potentially regulating social media in some way.. be it as non-invasive as warning messaging.