That has always been the case with humanity in general. Think of book authors, there are few of them, but they've been influencing our thinking for hundreds of years. The problem now is, the barrier for entry has become incredibly low (although, this would have been true when the printing press was invented too).

I stopped using reddit because of this. I've no idea about the credibility of the authors, their intentions and their motivation. When I'm listening to someone's opinion, I'd like to know more about them, so I can decide for myself how seriously to take it.