That is not true, people think they couldn't survive without their smartphones but anecdotally, and as a systems engineer, I feel free without it. I use a PC for work and play, but not having a computer in my pocket constantly spamming me with trivial notifications helps me delineate life and the digital world. I used to waste way too much time on my smartphone as well, with a daily screen time of 5 hours, so now I find that I've got more time for hobbies, friends & family. </anecdote>