I don't think deeper is the right word. Nicotine has a physical addiction element that social media does not. You cut off social media, you at worse face some boredom and FOMO.

And PM's earnings are mostly from developing countries at this point. In the US alone, the adult smoking rate has fallen nearly 73% from 1965 to now, so clearly the regulations are working.

We need to do the same for social media. People didn't quit smoking because they suddenly got more disciplined. We just made it inconvenient. The biggest start would be get rid of algorithmic feeds and "recommendations" keep it purely chronological, only from people you explicitly follow.