It's far more risky to sit in a public hot tub. Personally, I've never worried about cleaning an in room jacuzzi at Disney World, or any other hotel, for that matter. And I'm pretty sure I've never suffered any adverse effects in over 10
DVC stays.
All that being said, last month I stayed at the Hotel Palomar in Chicago, and my suite featured a bathroom with a 2 person Fuji tub. Had traditional jets as well as the "champagne bubble" holes at the bottom of the tub (like the new tubs at VGF.) Also had an uber-cool self cleaning function that ran automatically after each use. After seeing the VGF models at SSR last week, I thought to myself that a self-cleaning tub would have been more appreciated by members than a TV in the mirror.
By the way, OP, we were in a Treehouse last week and I'm pretty sure the dishwasher detergent was Finish.