1. Universal actively promotes themselves as a thrill-ride park. You can't blame vacationers for seeing the marketing and thinking, "Nah, that's not for me," if they don't like thrill rides.
2. How many of the non-thrill rides listed are kiddie rides? For someone without kids, what should I find appealing about Caro-Seuss-el, Cat in the Hat, Seuss Trolley, or Woody Woodpecker? Also, how many people consider Slinky Dog Dash to be a thrill ride? And there are 2 more parks at WDW that were omitted from your list (notably, Magic Kingdom, which is still a huge draw for people going to WDW).
3. Obviously, very few (if any) guests at either resort are fans of every single IP in every single park. But for many people, Disney's IP has a different level of attachment. What does Universal have that has the combination of nostalgia for adults and modern appeal to kids that the Fab 5 have?
1. Their newest media push with the yellow dummys 100% does ill give you that
2. So you don't want thrill rides and you don't want kiddie rides? Ok rides I would consider family attractions:
DHS (7): BATB, Frozen, Indy, MMRR, Muppets, TSMM, Mickey Shorts
AK(12) : Animation, FotLK, Chakranadi, KiteTails, Nemo, Gorilla Falls, Bugs Life, Safaris, Kora Tinga Tinga, Jungle Trek, Na'vi, Tam Tam, Viva Gaia,
USF (13): Despicable Me, Hogwarts Express, ET, Fast and Furious, Kang & Kodos, Men in Black, Jimmy Fallon(?), Bourne, Horror and Makeup, Blues Brothers, Tales of Beedle the Bard, Animal Actors, Celestina
IOA (6): Hogwarts Express, Flight of the Hippogriff, Storm Force, Poseidon's Fury, Frog Choir, Triwizard Spirit Rally
I will 100% give you that given your desire of no thrill rides, MK and EPCOT are the best parks in Orlando but USO is a 14 mile drive from MK. Honestly once I'm in Orlando there is much of a difference to me as far as who owns which park... I just go to the one I want to go to.
3. Emotions can play a large role in your decision making. I personally love and grew up with HP, so that has just as much emotional attachment to me as the fab 5, but I totally understand if that is not the case.
I'll reiterate, people can go to whatever park they want. They DO NOT have to defend themselves if they don't want to. It just simply surprises me that people will go back to WDW repeatedly, but never give an extremely similar product at similar costs just down the road.
Linking it back to the G+ thread... I actually don't mind G+ that much, but I do prefer the Express pass that Universal offers. I would like to see disney offer a similar product because I think it enhances the experience. I am a Disney fan boy all the way. I definitely go there more than USO. If I have 4 days in Orlando I will probably just hit the 4 Disney parks. However I would much rather hit USO on a 5th day than repeat a disney park. Also comparing the skip the line systems. I would much rather have an express pass at USO for a day than a day at MK with G+