It's just their perception of the park. They perceive it as catering more to younger guests. None of us need to agree. And we don't need to defend liking the park or defend the park itself. It's fine for someone else to perceive the park as being mostly for little kids. Others don't see it that way at all, and that's okay too.
But sometimes we perceive something one way even if, when stacking up the "facts" of the situation, our perception seems illogical to others. It's a bit like when people are afraid of something and you hit them with statistics to try to prove that there's no reason to be afraid of it. But after all of your work, they're still afraid.