I'd venture there are myriad situations where someone is 100% telling the truth, but their needs also fall in-between. As has been pointed out, they might be able to tolerate some queues, but have a harder time tolerating others.
Part of the problem is that WDW standby waits have become rather extreme.
Looking at HS today: Alien SS current wait is 25 min, Meet Disney Stars 40, Olaf 15, MMRR 55, MF Smuggler's Run 40, Muppets 10, Slinky 70, ST 10, Meet Chewbacca 20, Rise 75, TSM 55, ToT 40. (green = under 30min, red = 30+min)
There was a long period of time where guests could ride most attractions using a combo of rope drop/FP-/FP+/late hours and not wait more than 25minutes for any attraction, even the newest attractions.
Heck, there was a time when MK had E-ride nights for just $10, and guests didn't need to buy it in advance. If you felt up for going, you bought it that day, and it was just $10.
I suspect there are a number of folks who could manage 20minute waits with breaks, and/or maybe sitting out one/two of the extreme rides in each park, but they cannot easily cope with repeated 40+ minute waits all day.
Inflated wait times are another big problem.
Disney is largely to blame. They eliminated park benches, shortened park hours, post wildly inflated wait times, and now charge $25 for ILL's. Altogether those changes make park touring more difficult. It isn't at all surprising that a greater % of the population has trouble coping with those changes.