sorry why do you presume they're superficial? or i should sat why do you exalt your small town interactions over someone else's big-town interactions? i've lived in both a smalltown (currently) and brooklyn ny (previously) and the depth of the interactions is absolutely about the same.
btw we can all play presumptuous and haughty: in your "tight-knit" community no one will help you/acknowledge you as soon as you diverge from highly constrained cultural norms even a small iota - where as in my diverse working class neighborhood in brooklyn that wouldn't be the case. what do you say? not true? color me just as suspicious as you color yourself if i claim to you that i actually had deep and genuine conversations with my neighbors, grocers, and occasionally fellow subway riders.