Crowdsourcing doesn't work if one voice drowns out all the rest. Then it just becomes a form of transmission, rather than interactivity. "The wisdom of crowds is extremely fragile, especially in two specific circumstances: when people are influenced by the opinions of others (because they lose their independence) and when opinions are distorted by cognitive biases (for example, strong political views held by a group)." Simply being a crowd doesn't create knowledge. Being a crowd properly organized creates knowledge.