What is the point of staying in contact only in Facebook ? If someone is important for me, I'd be in contact with them in real life or another platform.
Also, lots of people seem to be unaware of that you can delete your Facebook account. They don't have a link to the delete page from settings menu though. It's here:
https://facebook.com/account/delete
This is one of those 'soooo obvious but untrue' statements
I use it to keep in touch with far away or unimportant people. Second degree aunts, ex schoolmates, etc. Without FB it's a nightmare keeping in touch the few times I want to (people change email addresses all the time). Also, many groups are useful
You can stay in touch with relatives via mobile phone. You can text them and ask how they do. Personally, I created a Whatsapp group for my extended family. Some of them don't use Facebook by the way.
It doesn't make any sense to complain about Facebook's business model and also not want to sacrifice a worthless personal account noone cares about.
We choose what we use and they choose how they make money. You can expect them to be ethical but they have no responsibilities to meet your expectations, as they have never promised to be a platform that respects privacy.
I own Whatsapp. Do you know why? Because I own my contact list. I can migrate my whole family to Telegram or Signal tomorrow. Currently it's not bothering me.
Also, lots of people seem to be unaware of that you can delete your Facebook account. They don't have a link to the delete page from settings menu though. It's here: https://facebook.com/account/delete