To paraphrase Troy McClure: Be happy, stupid!
Dude - everyone is tied to their phones. Take a look around any public area and people aged 10-100 will be on their phones. This is not just a “younger generation” thing.
And the younger generation definitely interact outside of their devices. Sports leagues, pub nights, whatever. Maybe not where you are, but that’s more of a location thing.
Yeah they do, because those are things. If you have a job, are totally rich, and live in a big house (or whatever you think is “perfect”) but work so much that you don’t see anyone, or your family/marriage life is utter crap, then damn right you’ll have depression and loneliness.
Your “solution” is….wow. I’m not even sure how to respond to that.