This is obviously an overstatement. Sure, a phone is convenient, but we managed to function just fine without smartphones. I assure you, it's possible to do all those things without a phone.
Without knowing where GP is posting from, you can't make that claim. We can want and wish it were true, but there exist places where it's no longer possible to do things without a phone because the service requires signing in online, or the form is only available via the website, there is no paper version anymore. Parts of the world are moving on from bits of paper, no matter how much you don't want that to be true. Parts of the world also aren't, we simply don't know where GP is so you can't make that claim.
We managed without smartphones before smartphones were a requirement for participating in society. That is, if you’re a millennial or older.
We can’t just pretend that it’s possible to live an adult life without one in 2026. In 2008, certainly, but that’s not the world these kids grew up in.
But we’re talking about kids, which is a whole different matter.