When did we become a society of people for whom job and role were the only basis for "common ground interactions" or friendships?

It seems that unless you “work in an office”, belong to a group that does “x”, or have a religous/political affiliation, people are unwilling to talk to you, or even get to know you.

Unless of course, it is done embracing the anonymity of the internet.

There are a lot of things that connect people, when did we start depending on people’s “tags” to decide if we wanted to get to know them?