> You don't need FB to comfortable communication with friends.

You don't need planes to meet your distant relatives, but flying is often much more convenient than other modes of transportation.

> So there is no reason to use it.

Convenience is my reason. If you don't have reasons for yourself, that's fine, don't use it, but don't say for everyone.

> feeding the machine

This is a bit dramatic.

>You don't need planes to meet your distant relativesx

This is not a good parallel. You can use any modern instant messenger like Telegram to talk to your friends as comfortably (or more).

It is a good parallel. Obviously if your relatives live on another continent, flying is the optimal, but for example you can ride a bus from SF to LA instead of flying.

Bus takes much longer, whereas other messengers are practically as convenient as Facebook.