You think it s a social network. A place you can interact with others. In reality it is Spam central.
All those posts you think are articles, whether political, social, entertainment, etc. are advertisements. And as soon as you click on one of them, your email address is targeted.
You will be receiving trailer loads of spam every day.
That’s how Facebook makes its billions; selling space on their site and your email.
When you join, use a crapmail account; some free email that you use nowhere else. Use a nick to create the account and join FB.
In that way, all you have to do is go to your crapmail account and delete all the rubbish, keeping your real account safe and private.