Because I think the average person doesn't research parks. They go to have a good time and not think. At Disney, you were trained to not be sarcastic when people asked cast members things like, "What time is the 2 o'clock parade?" Or people who think "Harry Potter land" is at the Magic Kingdom. Heck, I know a lot of people who are surprised to hear there's more than one Six Flags park. And that sort of thing happens all the time.
I mean, even the New York Times doesn't do the research, as seen below.