In my perspective (a lonely person generally accustomed with my loneliness), small talk doesn't seem to be the problem. The problem is the lack of people's interest in deep topics, such as the aforementioned nature of reality: people either don't have the needed patience, time, or both. People are so busy running through the survival game of the mundane existence that deep topics are left for their afterlives (if there's one), when human ideologies and need for survival cease to exist. Small talk is like "sorry I got no time to think about the ultimate question of life, universe and everything else, gotta go to my modern slavery where I'm not paid to think but to obey, bye!". Deep inside, seems like a fear of becoming lonely as those that, just like me, likes to think about the depths of the reality and breaking paradigms (for example, "shouldn't we discuss how existence is so fleetingly finite in the grand scheme of cosmos and how futile is to accumulate wealth and goods?" is a granted source of loneliness).