- You're not forced to create a Facebook account to use your phone
- Switching operating systems doesn't prevent you from receiving messages in Facebook groups you were in.
I'm not going to respond again because I don't think you're reading my responses. If you can't understand that ask your parents or caretaker for help.
All it does is improve the use experience for people who do use Apple’s platform. They are just as able to communicate with people who have SMS as they were before and vice versa. You are going to need to explain this ‘isolation’.
Literally billions of people use competing messaging apps such as WhatsApp or Facebook messenger.