The problem is that FB encourages a popularity contest online. This is not healthy. We are social creatures, but the internet based social does not cater to our social needs. It caters to our dopamine kick needs.
Several studies have proven the ill effects of social network. So you are only partly correct.
Social media is socializing now, whether you like it or not, and whether you're along for the ride or not.
In that light, it's strange when people say it's "addicting," like that's a bad thing. It's supposed to be - we're social creatures.
Sharing things about your life with friends and family is not some horrible drug we need to curb.