I wonder as well if there's a difference between people who use it to catch up with their real-life friends vs. people who use it to communicate with online friends. I deleted my Facebook account last year simply because I had never used it; most of my friends on there were people I was acquainted with in real life at some point but I have no desire to talk to them. I never used it so I just deleted my account. However, I use Twitter, and I'd never dream of deleting it; most of my interactions on there are between me and friends I initially met online, and social media is one of the main ways we communicate. These are real friends - I've met several of them in person now - but I'd be losing a huge channel of communication with them if I went dark on social media.
Which, when worded like that, almost sounds like they're trapping me on there, but I also have no desire to quit. I've never felt Twitter negatively impacting my life. I go on it daily, I usually have it open in a tab while doing other things on my computer, but I don't spend hours just scrolling, and I don't follow people who say things that will only make my day worse. I don't see it as wasting my time any more than watching TV or doing crossword puzzles, which are also things I spend a reasonable amount of time doing.
The comparison to cigarettes and alcohol is ridiculous in my opinion. I don't buy the premise that social media, by default and for most people, makes your life worse. Maybe I'm just the exception? I have no idea.