That's not the point -- most Disney films have intense moments.
This is a theme park attraction, and the main audience for Moana is kids. It doesn't make a lot of sense to build a ride that a significant portion of the intended audience can't ride. Physical intensity is different than an intense movie scene.
Again, this is speculation because all we have is a patent (and who knows if they will even use it). But Animal Kingdom doesn't really need more height restricted attractions at all at the moment, and they certainly don't need to build a height restricted Disney princess attraction.