Because it’s a water park so why not fill it with real themed rides that get you drenched in addition to the slides?
I really really really love the idea but I kinda think its more so due to the cost it takes to operate and maintain vs traditional water slides. Its requires way more engineers and maintainers on hand if something goes wrong with those than what a traditional water park deals with. There is very little chance of someone getting stuck on a waterslide with no way out, a ride like Dudley gets stuck you have to wait for a lot more people and that ride is now out of operation for such and such time. That water park roughly would be the same price as one day at USF vs the discounted price VB is for one day.