You've fallen into the trap of looking at this from the perspective of one who goes to WDW frequently and "knows the ropes"--both figuratively and literally, and who goes to Europe and/or Hawaii far less frequently, and perhaps as a once-in-a-lifetime trip. Now put yourself in the shoes of someone who lives in California, goes to Hawaii every year in October, likes to stay at the Hilton Waikoloa Village Resort on the Big Island, likes to spend a day horseback riding in the Waipio Valley, likes to spend a half day snorkeling at Honaunau Bay, likes to spend a day at Volcano National Park,
and prefers to hang around the resort the rest of the time. And imagine that this person like to take in a luau, dine well at Merriman's and Brown's Beach House, and enjoy the remaining meals at smaller, more casual places and sushi joints. How long do you think it would take this person to plan that vacation? About 11 clicks of a mouse? Now imagine that this same person is planning a once-in-a-lifetime trip to WDW. Harder to plan? Oh yeah!
I know people who go to Paris 4 or 5 times a year. And WDW never. If and when they decide to go to WDW, which will be harder and longer to plan--their next trip to Paris of their first trip to WDW?
I commented similarity about familiarity that aids in less planning required. (Feel free to look back at my first post around page 2 or 3.)
Familiarity does enable folks who travel to the same place frequently to not have to do anything exceptional over a newbie.
But I highlight your once on a lifetime comment. It is placing a parameter that was not the central focus of discussion. As happens often. So let's discuss that.
I am not positive if this encompasses all the groups that come to Disney...
But you have the ones who to often enough they could *almost* literally just show up and have a great time. (This is pretty much my family.)
The ones that to frequently some cycle, be it yearly, every other year, every five years--whatever. They may or may not go often, but they are pretty familiar and minimal planning is done. The amount directly correlated specifically to what exactly they wish to accomplish.
The ones who to infrequently and so much changes in between visits that the place seems new to them. The may or may not spend a lot of time planning. But their planning may involve more than the above guests as they familiarize themselves with what's new. But they may not do this.
The once in a lifers who don't want to miss anything. Level of planning correlates to their planning philosophy and overall personality. It will still vary by individual.
These groups can practically be applied to almost any destination. And planning can have as much to do with their familiarity or lack thereof as their personality. Are they are micro manager? Are they a free spirit? Are they an early riser? Are they a night owl.
I don't think it can be said that Disney, as a destination, inherently requires all this planning that exceeds a newbie's trip to Paris. For starters, if they speak English and no French, Disney would be easier. If they have never navigates a subway--navigating Disney by bus with easy point to point transportation and relatively easy transfers isn't going to require more knowledge than it would take to navigate the metro.
With Disney--you can still plan as much or as little as you like. But FP+ did nothing to complicate familiarity or lack thereof. If you weren't familiar before FP+--you would have still required more pre-planning of you wished to have that familiarity before arrival. That idea does not change with FP+.
FP+ didn't suddenly cause people to mix up DHS with Universal. They did that before.
FP+ didn't suddenly make the bus routing system hard to ride. That occurred before.
FP+ didn't suddenly make a first timer disoriented as to where each park is located. They were disoriented before.
And FP+ didn't make folks think that this was an extra-fee service. Legacy had that problem, too, but I cannot for the life of me understand why.
A first timer still has a lot of homework that is directly correlated to how much they want to know before they go and their personility.
But place a first timer who has never been to Disney or Paris, I posit that their planning style will still require a bit more intentional effort for Paris.
Back to Disney--I can go most of the year, no problem. But I have never been on Christmas Day or New Years. Comparatively, I would probably do more "planning/preparation" for that because I do hate crowds. It is new to me and I would hate to go and feel like I did nothing. But, I have never been to the Macy's da parade either even though I have been to NYC twice. I think that would require more pre-planning than a crowd 10 day at Disney.