People make Documentaries about normal people all the time. You’re just never going to see one produced and marketed by a big media company, because the people who green-light pictures for big companies are rich and influential, and they want to see themselves on screen. They will always assume no one wants to see normal people. That’s boring and couldn’t possibly be interesting to anyone. It certainly doesn’t interest them what the plebeians are up to. There’s literally too many documentaries about normal people to even point them out to you. You’re just never going to see them if you only watch what the industry is interested in showing you.