Social media is a tool, it can be used for good or bad purposes. Like some other tools (firearms come to mind), it can change us by making some actions easier, more efficient, or even possible at all. Parachutes don't force us to skydive, but they make skydiving (at least more than once, as they say) possible if you choose to do that, and that can change your life as we all know. Some tools have more risk than others, but none are a cancer unless we allow them to have that effect.