People around me don't like talking to taxi drivers or hairdressers. Taxi drivers and hairdressers, by virtue of their profession, want to connect with their customers. Rather than remaining silent and not speaking at all, they make the atmosphere more enjoyable by talking.
At first, I too found it unnecessary to talk to strangers. Later, I realized it was beneficial. For example, this way, you can easily ask complete strangers for directions or ask for help with any issue.
Learning how to communicate well with strangers, also helps develop far better skills at communicating with familiars!