There's this paragraph in the book:

“One of the things Ford Prefect had always found hardest to understand about humans was their habit of continually stating and repeating the very very obvious, as in It's a nice day, or You are very tall or Oh dear you seem to have fallen down a thirty-foot well, are you all right?”

Am I correct that Douglas Adams was joking about how British people talk to each other (like, 'Are you all right') using this paragraph? Or is this paragraph just a simple joke without mocking the Brit's culture?