Years ago, I was asked to come up to do a store signing in Vermont. The short version is the two younger guys who own the store pick me up at the airport and start driving me around Vermont, showing me the sights and the textile mills and the restaurants, and the punchline is there's no store. There is no store!
The beauty of Captain America is that you didn't have to come from a distant planet, like Superman, or he didn't have to be born into a family of billionaires like Bruce Wayne. He happened to be in the right place at the right time, and someone gave him a magic potion, and he grew muscles and became a superhero.
There is a reductive nature to the Internet, and it's not limited to comic book news sites and stuff: it's everybody. There is a reductive nature of it, by which anything that's said very quickly gets reduced down to the next. Reduced, reduced, reduced to the point where rumors with some sense of nuance to them just become fact.