Because of the New York effect. The personal information density is so high that we tune it out automatically as not to be overwhelmed. Outside privacy cannot b

Because of the New York effect. The personal information density is so high that we tune it out automatically as not to be overwhelmed. Outside privacy cannot be maintained so we strengthen the inner one, by not paying attention to other humans. Go to New York and you'll bump into people every 5 steps you'll take, but you'll just ignore them and they will ignore you. There will be no meaningful relationship there, others may be furniture, just as well. So we get more lonely as we get more connected. Personally I think our jungle - evoluted monkey brains are not capable of dealing with so many social connections, as we used to live in smaller groups, of 30 or so. So we just tune out the overwhelming information.