Yes. Most people don't have the awareness of a lot of what's been said in the comments or they suspend it in their daily lives. They do what they feel is right and since most were socialised in a similar way the signal-response expectations match. Then a certain rapport can be formed by the empty interactions borne out of the semi-conscious feeling that it's "right" or "nice" to initiate a small talk and respond to it in kind. In this way indeed most of us are like 15 yo girls, just somewhat more serious and self-controlled.

If I were in a condescensing mood I'd say humans generally are bots following Pavlov's reaction patterns imprinted during upbringing. But this would be a severe oversimplification and a little a-hole talking through me.