Are you... serious? What exactly do you think a theme park is?
The entire post you've quoted here to "prove" that he's not talking about themed design is... quite literally about themed design? In this specific context, themed design that launched media franchises. Their point, quite clearly, is that Disney built its THEME PARK reputation on the back of original content designed for the parks. That's the entire point of the discussion being had. He's saying it makes sense that Universal builds movie rides, because that's all they've ever done in the theme park world. He follows up by saying that it's foolish for Disney to do only the same, because their most successful contributions TO THEME PARKS have been original concepts. Im honestly struggling to even begin to understand how that was difficult to understand.
Also, are you under the impression that the low budget opening day "get the park built" Disneyland attractions are what has defined Disney in the zeitgeist? Not Pirates? Haunted Mansion?
I genuinely don't know how to respond to you because it's like you're having a different conversation from everybody else while loudly insisting that the conversation you're having is actually the one everybody else is having.