I didn't take it that way at all. From the article, it doesn't sound like a lot of that information came from directly from SeaWorld. It was some analyst that made these statements. And SeaWorld just broke attendance and revenue records, so I wouldn't say they're hurting.
The CEO of the company claimed Diagon would be a good thing for SeaWorld and would help bring in more people to the area.
"The fact that there [are] other operators in town, sophisticated operators who invest in the business … is actually a benefit to all of us. And so when we see attractions like even Transformers this year, Fantasyland this year at Disney or Harry Potter 2, as you are alluding to, that's actually a benefit for the whole destination," Atchison said. "It tends to provide more lift, brings more people to the market [and]…then they can pick and choose the parks they go to. So it tends to raise all the ships if you will."
From the same article.