i would place my money on the vast gap between effort and reward. you dont even need to think "if i swipe..." because the thought takes longer than the action. So why would you stop to consider what you might have to gain by swiping when you can literally swipe and find out faster than you can think about it?

Then you go about your regular day and suddenly everything feels harder in comparison. You have to think about what youre doing, you have to coordinate or plan your actions, you have to put work in. The swiping rots your ability to maintain and coordinate your chain of actions.

it weakens your ability to have intent.

This is it. Modern social media is a Skinner box. The context switching is a feature (short term dopamine hit in exchange for deep learning).

A slot machine affect. Viewing our society as an addicted one clarifies most of our social ills.