This is the precise problem. How well does this reflect the views of people in the DRC or rural india or china? I.E. most of the people on earth. Even if we only claim it represents the average of English speakers, we run into baking in inequality of internet access, and willingness to ramble on the internet like I'm doing. Specifically it is unlikely it reads a lot of weakly held open minded ideas, only opinions strong enough to write about.