I suppose it must be hard finding one that fits on your ear trumpet.
Lol.
It's a number of things. When they first started coming out I worked at a software company, most of my friends there were engineers, were dead-set against another screen, so I didn't either. A few years later when they were becoming very popular, I had broken up with someone who was still calling me all the time and I didn't want the electronic tether and be constantly available.
I started seeing people driving like shit while using them, staring into them while walking down the street, just the overall addiction, and didn't want that. I still haven't figured out the constant attention, what people are doing with them seemingly for hours on end - whatever it is, it can wait until I get home. I didn't want the obligation of reading texts and responding to them - I prefer face-to-face, or if it's really important enough go thru the extra trouble send me an email.
I've had companies I work for try to give me one.
It wasn't for my convenience. My kids have them. So do my parents. Everyone I know does. People are frustrated with me about his, but there's never been a day when I woke up and said ''I'm going to get a cell phone today''. I get plenty of internet time in with my laptops, I guess it would be handy for ordering dinner for pick up on the way home, but that's about it. Someday I'll wish I had one to get a Uber ride...