How do you differentiate between addiction and people really liking something? In my opinion, unless people try to stop doing the thing but they can't will themselves to do that, it isn't an addiction.
It is not OK to dilute terms used to describe serious problems. I am not saying tech addiction can't happen, I just haven't seen any evidence to that effect. Mere dependency or development of a habit isn't addiction. addiction is those things plus inability to quit the habit despite strong and persistent effort.
Perhaps a good litmus test might be a person's ability to go on a week-long vacation without their phones, internet or whatever the supposed addiction might be.
There are addictions like Porn or eating-disorders that can be exasperated by tech, but they're not "technology usage" addictions, they're "addictions that can be enabled by technology".