Nuggets

I've been fighting this battle for years and I still fight it every day with my kids. First, you MUST set limits on everything addictive to children in your house including the internet. Limit the content they can access and the place and time they can use it. You can adjust the limits, but never remove them. Second, if they're old enough, explain the concept of addiction to them. Here is a perfect video to do that: ▶ this video A child will understand exactly what addiction means after watching this video. Third, show them that you also have limits on your own tech usage. They might not be the same limits you put on them, but you have limits. They will understand this way that limits are not something they can "grow out of" and are part of being an adult. Last, when they do break the rules, don't shame them for it and don't give them approval for it either. Make it clear that you still love them and the rules are still in place. Good luck.

It's like that short animation of a Kiwi bird getting high[1]. Each cycle gets shorter and shorter to sustain the high. [1] ▶ this video

Just because a drug doesn't kill you physically, doesn't mean it doesn't harm you in other deeply profound ways. Related: Nuggets[1] 1. ▶ this video

What you said reminded me of the bird video about withdrawal and habituation: ▶ this video (which of course may be biased in the other direction) But that's my stance on drug use as well: It's pretty irrelevant how great your time is while you're on it if it turns your life into hell whenever you're not on it.