I don't use Meta products, and haven't for many years. But I still have a Facebook account, because a) deleting it would be a fairly rigorous process, and b) as long as I maintain the account, I have some control over the information about me that Meta maintains; if I deleted the account, they would maintain a "shadow profile" for me that I had no control over, and (for instance) any photos tagged as containing me, I would not be able to go in and untag.