Facebook was the thing that came along post Myspace and unfortunately is the product of someone with lacking ethical imagination. People feel forced to use it or else they don't know why it's bad. And I don't think people who use these things are automatically addicts. It's not their fault the company and leadership lies to them (about various things. Privacy and whatever else)
Of course people "can just stop". But that's hard. We shouldn't be punished for involving ourselves in the game of network effects, of wanting to have friends
When Mark Zuckerberg makes a policy like "it's ok to call certain groups mentally ill" (https://news.ycombinator.com/item?id=42651178) it's rug pulling. Even if you didn't know about Dumb Fucks (https://news.ycombinator.com/item?id=1692122) you use these services both out of necessity and because you think it's a way to keep in touch. People don't "willingly choose" this. They had the rug pulled out repeatedly, whether it's censoring links to competitors, shadow profiles, impossible to delete an account, or whatever. It doesn't have to be like this but that doesn't mean people using their products are bad people for using their products