We're getting pretty close to a group hug here !
Mansfield makes a lot of sense to me. I still maintain that the underlying principle is simple, but agree that this doesn't mean that the aircraft handling or the requisite control engineering is going to be simple.
("simple" is not a synonym for "easy". E.g. if you fall off a cliff the problem is simple... )
One of my favorite sayings (in response to "it isn't rocket science"):
"Rocket science is easy - its just Newton 3. Rocket engineering on the other hand... now, there's a challenge." 
pb