What do you think about people who don’t have Facebook or Whatsapp Account?

I have seen some people who don’t a Facebook account. And they also don’t install Whatsapp. Is not life boring for them?

I think they have no time and are busy with other work. But I find it odd when people say they don’t have a Facebook account and are not available on Whatsapp. Odd because it gives me a feeling how can they be without using FB and Whatsapp.