Yes, my phone is like an extension of my brain. That point they make is one I agree with and one I will not argue.
Gen Z understands this VERY well. (I go outside.) These WIRED nerds do not offer a persuasive argument for why what Gen Z is doing is Bad. At all.
The only thing they can do is resort to class politics by telling them that they'll be creating a disadvantaged class, themselves, which is Bad. More people carrying around dumphones makes that hypothetical disadvantaged class STRONGER, which makes it a radical act of protest and activism. Given that these authors clearly are only familiar with these ideas of class and privilege by osmosis from culture since 2014, they failed to anticipate this obvious line of attack.
That's the tell that they don't hold this framework of society themselves. These people are unquestioning, blindly-faithful technoutopians. They hold to the idea that smartphones will bring us closer to The Singularity and that is good, whether they want to say it explicitly or not. Don't let the focus on technology confuse you: this is a millenarian argument. Or, rather, since I don't even consider it an argument, a millenarian plea.
These nerds wrote a screed to anti-smartphone Gen Z men and women in which they simultaneously 1. blame and shame them for and 2. beg and plead them to stop holding back the Second Coming of Christ. In their case, their version of the Rapture is "the Singularity."
Their failure to recognize their technoutopian visions as a 21st century close analogue of Millerism is to our benefit. They won't understand this critique. Don't help them.