I've always wondered the same thing. We have a little dog and have taken her to Disney in the past (when we owned a house in Central Florida), but the overnight kennel charges were outrageous and we were not too impressed with the kennels.
The Loews hotels are amazing. We love the pet friendliness. I think it would be cool if WDW adopted pet friendly at least to DVC. I understand that they're probably worried about allergies.
Loews designates certain halls to pets (when you book, you book a pet-friendly room), so that way, guests not travelling with pets (especially those with allergies) will not be staying in a room that once had an animal in it.
And keep in mind, guests with service dogs are staying at resorts, and though this of course is a much smaller number, you might be staying in a room that once had a dog in it and you don't even know it.
I loved how at Portofino there were dogs outside at the cafe (leashed, of course). My Dad's a big animal lover and he really enjoyed flirting with the dogs.
