Yes I can imagine life without the internet.
I lived my life for at least 13 years without the internet before I got the internet at age 13 so yes it's possible for me to live without the internet if I needed too.
However I do notice that when I am without internet when my internet goes down that I start going crazy and feel so bored.
I do need the internet though to make an income because I work from home so right now I could not live without the internet.
But I could find a job eventually that did not require the internet.
Kids born today or at least in the last 5 to 10 years would likely not know what to do if the internet ceased to exist.
Because most kids have grown up with the internet.
People lived billions of years without the internet so it's possible but it seems impossible now that we have it.