In some essays I find that at the title of the question they say that "some people say so and so" do they mean that the people of fame or VIP or ordinary group of people? ?
They could be referring to a group of people, who others would agree, that the members of the first group should know what they are talking about. People usually feel that there is a group of people somewhere who should have expertise on anything which may be mentioned.
I guess they mean ordinary people. People you meet every day.