Anyone making this claim has a severe sampling problem. If you personally don’t talk to people, you can be under the impression that nobody talks to people. The people that do talk to people can read signs for who wants to talk and they talk to each other.

The false impression is further reinforced if you go outside the country because as a foreigner people are more likely to talk to you, offer help, etc.

Your evidence would be stronger if you were a person who did care to talk to people but found that in a certain country nobody replied.

People may have a different experience if they are more extroverted, but some places really are friendlier than others.

What country is this and how do you ever meet new people?

Are you saying people in your country don't meet strangers at bars, parties, through participation in sports, at dance clubs, or special interest clubs?

Also, while you say you don't care for it, you do realize that you're talking to strangers right now, don't you?