Social media isn't the only way to stay in touch. In fact all it really is, is a way to automate the means and pleasantries by which we relate with others at the more human/animal level. We "poke" and "react" and "share" on these platforms just like we do via other communicative tools like phones, letters, and telegrams.
With the gamification and addictive nature of these social media platforms, we sort of merge sports and games with socializing, allowing everyone to be a socialite like the ones we all have read about from yesteryear. This devalues social relationships and puts a greater emphasis on MORE of them; an opiate addict always ends up eventually using heroin.