I couldn't help but notice that your comment doesn't address the other parts of his argument, nor did you choose to respond to the earlier reply you received (by dragonwriter) outlining the legitimate flaws in the reasoning you provided with your initial opinion.
Social media has a lot of problems - even this article on just Facebook outlines a number of them [0] but I agree with the above poster in saying that you can't have a societal post-mortem analysis of the effects of social media given its very much _not dead_ state. Advocating that society just presses a 'shut down' button until "we collectively decide how we should proceed" is an entirely unrealistic scenario.