Getting back to the article-
#1-People who have never been to Disney, and who want to "see everything," don't often realize the planning and coordination that needs to be done in order to have a positive Disney trip. After decades of Disney trips, I still get a new copy of the Unofficial Guide to WDW every five years or so. I scour these boards for the newest information about the parks and hotels. Can people do a more laid-back Disney trip-yes, BUT I wouldn't suggest it for first time/once in a lifetime trip visitors.
#2-If you have never been to Disney, you are might not even understand the concept of magic bands, Lightening Lanes, Early Entry, Extended Evening Hours, and the sheer HUGENESS of the WDW complex.
#3-It is very easy to look at off-site locations and think "this hotel is only five miles from WDW, it should only take us ten minutes to get to the parks," without realizing how traffic congestion can quadruple that time.