This is not a conspiracy theory. It is documented in testimony from former employees of major platforms, in design patents, and in the academic literature on persuasive technology.
Social media platforms use a technique called variable reward scheduling — the same psychological mechanism that makes poker machines addictive. You do not know when a scroll will produce something interesting, exciting, or validating. That uncertainty is what makes you keep scrolling. Unlike a poker machine, the algorithm learns your personal triggers and optimises your feed to maximise the time you spend.
Dopamine plays a central role. Likes, comments, and messages trigger small dopamine releases. The anticipation of potential social validation — will anyone comment on my photo? — is itself enough to create a checking compulsion. This mechanism is powerful in adults. In children, whose prefrontal cortex (responsible for impulse control and long-term thinking) is not fully developed until their mid-20s, it is significantly more powerful.
The social media ban addresses this directly by removing the most addictively designed platforms from under-16s. But the addictive mechanism exists in YouTube's recommendation system, in online gaming, and in browser-based content. The platform is the most potent source; it is not the only one.