as others have said, smartphones do more than serve as pipes to fill your life with media and facebook dross.
i have never had the facebook app installed on any of my phones longer than the 2 minutes it takes to find the options menu and uninstall it when the phone's new.
music and video, translation, gps navigation, calculators, unit converters, i've even seen some cool apps for measurement (probably not accurate but definately neat and handier than carrying a tape all the time), photo and video capability, banking as well as being able to use whatever communication app of choice (be it whatsapp, discord, skype or just plain ol' sms) however are all very useful.