Why do foreigners always chat when they meet?

This phenomenon is particularly prominent in Britain! Britain is a country of etiquette. Generally speaking, the British will think it is impolite to talk in conflict, but the topic of weather will not conflict because of the opposite position, or the possibility of conflict is very small (everyone looks up at the sky). For example:

One person supports team A, one person supports team B, and the chat conflict is over.

One person supports Party A, one person supports Party B, and the chat conflict ends. 、

One person believes in religion A, one person believes in religion B, chat conflict, end.

One person thinks that work is greater than family, and one person thinks that family is greater than work. Chat conflict, over.

. . . . . .

However, the weather:

"It's a beautiful day." "Well, I agree."

"I really want to rain." "Yes, it's cloudy."

Then the weather can lead to more topics. . . . . .