What is the value of all this?

I really don't know anyone would be interested in what I have to say on a blog, about green birds, or anything else. Nor do I know why I would be interested in what other people say when they waffle on about their personal interests - the whole thing seems very egocentric to me, and pandering to the ME factor. I also find it difficult to know why a Wikipedia full of individuals' added bits of information should be regarded as having any merit! How are future readers going to distinguish between authoritative information and Joe Blow's opinions?