If you think about it, what possible advantage of wisdom and training or education do any of them have over someone at random waiting for the bus at the bus stop? Or hauling a bag to collect returnable cans and bottles in the alley?
Actually the number of people that wonder about what famous people think is fairly small.
I think the explanation for this glitch in society is the fact that there is a somewhat larger group of people that make their living reporting on this segment of society.
These people have to produce a product written or video. Where do they get this product from people that have the distinction of being famous.
Why are these people famous? In large part because these other people make them so.
I think of it as a media Möbius Loop. Reporters need product so they find a famous person, ask this person questions and produce a work of semi-fiction based on the answers to those questions.
This famous person continues to be famous in part based on this published work. Because the famous people continue to be famous other reporters seek them out to produce work. And the loop continues.
Hence the trope 'There is no bad publicity'.
Looking for the best example of this I thought of the Kardashians. The first people that got the title of 'Being Famous for Being Famous'.
How it happened I have no idea. Nor do I care.
I know the tabloids and People and Us have slipped but the social media “followers” and “viral videos” about anyone who is a celeb or royalty still go into the millions.