This is hilarious to me because we do almost all our travel in a motorhome and bring our dog with us. The one exception is when we go to Fort Wilderness. We are gone all day, sometimes from 7 a.m. until midnight in the parks. I have no desire to keep my dog locked up in the motorhome that long even though she'd probably handle it. I get the people who bring pets to Fort Wilderness because they lounge around the campground and don't go to the parks everyday. I don't know why they pay so much for a campground to do this, but many people do.
But for people who are going to the parks, why on god's green earth would you bring your dog just to shut them up in your resort hotel room all day? Why worry about running back to the room to take your dog out mid-day? It's a 2 hour round trip at least from the parks. Where are they going to put dog runs at each of these hotels? You can't have a dog cooped up all day and then not have somewhere for them to run. Yes you can walk them, but that's not the same thing.
I know lots of hotels do this. I get that and I've stayed in pet friendly hotels for a night or two myself when traveling. But for an extended vacation where the entire point is to be in your room as little as possible? Day after day of leaving them locked in a small hotel room all day? I wouldn't do that to my dog, and since that's how I do Disney, it just makes no sense to me.
I will say I saw this move coming mainly because Fort Wilderness over the last few years went from having pet loops to having the whole campground be pet accessible. Mainly because the pet loops simply weren't big enough. People love their dogs. Treat them as family, and want them to go everywhere with them. Vacationing with your dog is just another component to that. All that being said, I still think Disney is exactly the wrong kind of vacation to bring a dog.
Finally, this is going to lead to so much more abuse of dogs in the parks. The ridiculous Emotional Support Animal rules already are rife with abuse, as you can get a script for it if you call some easily found doctors offices without even a visit. Then you buy your little collar or vest off the internet and off you go with your ill-trained dog into an environment like WDW which is exactly the wrong environment for an ill-trained dog. Allowing dogs in the resorts is just going to let more people feel like they should do this to keep their little Fifi with them at all times. Eventually it's going to go bad.
But lots of different people make the world go round I guess.