No offense but I don't understand why it was difficult for you. There's this little thing called a phone number where people call them, people have voice-based conversations which are far more personal than just a text message. And OK, I understand that not everyone can call especially if there's time zone differences but you can send text messages instead. And if these people are in foreign countries there's always iMessage which is free to use across borders.
Facebook is a plague, it's a disease. It needs to eradicated. All of humanity will be better for it if Facebook were to die tomorrow.
I don’t do calls. No one in Europe uses iMessage (exaggeration obviously)