Except that, why would people need to stop thinking that?
Because, its very obvious that, at the very least, becoming part of y combinator sets you up for major success. Just like being part of an Ivy League.
Sure, you can have success without it, but damn, why wouldn't you want it?
Life is a crapshoot.
People need to also stop thinking that incubator == success, or that not incubator == not success.