The reality, however is that social media companies with their curated feeds, dopamine buttons, echo chambers, and sheer size can push products to the market that cause detriment to the overall cultural environment. The average Joe does not understand that his Twitter feed is _designed_ to keep him hooked. I bet you, if he knew, he'd have quit long ago.
Your argument essentially posits that opioid addicts be held responsible for their addictions rather than our legal system clamping down on big pharma.