Earlier quoted context omitted.
> How ever did anyone survive before I really, really hate this mindless, lazy line of argument in general. It gets tossed out with absolutely everything, from the internet to vaccines to modern farming. The simple answer in many cases to "how did anyone survive before X" is "well, often they didn't". Life expectancies were in fact lower in the past. More people died, or were maimed, with no hope of treatment. Or som…
A 300-word answer isn't 20x more intelligent than a 15-word one. I think Walter said all that needs to be said, and more economically than you did.
I know, I know, this is sarcasm, but where is the argument? If anything, it is a textbook example of the "appeal to tradition" fallacy. There are many good arguments against smartphones in classrooms, that one isn't. For the details, see xoa's answer.