No, they're absolutely not. There are genuine concerns about exposing all people, but especially children, to multi billion dollar companies who engineer products to market to them by exploiting their behavior.
The people smugly gloating that young people will just have to 'find something else to do' in response to the social media bans are usually the exact same people who seethe with anger and make reports about 'loitering' whenever they have to share public spaces with teenagers.