It's apples and oranges really. I love going to WDW but by no means is it a stress-free hassle-free place to visit, and the price can be difficult to justify. My last visit was heavily discounted thanks to using a DVC membership for the room, but even so, room + admissions + dining plan + memory maker + flights came out to around $3k a person for the week. Compare that to the European river cruise my parents just went on: about the same price for 16 days in Europe, flights and meals included. But I'd argue that if you love the experiences at WDW, comparing it to other vacations is just silly. It's its own experience.