Yes, this tendency of people drives me absolutely insane. I don't know why people so strongly default to thinking of large organizations as a monolith, but it is one of the largest fallacies that I see repeated continuously here.
I kind of wonder if it is spill-over from Apple. Apple is notoriously tight, controlled from the center, or at least was during Steve Job's reign. I wonder if that brush doesn't get applied to every company, even if it is a very different type of company.