I agree with everything above.
Personally, I think it's part of the whole thought reform/brainwashing technique.
Telling someone that they can't understand something (in this case, pure bullshit) because it's too "deep" for them to understand is really just a subtle way to disparage or attack a person's built-in critical thinking machinery. You don't understand this? Well, there must be something deficient with YOU. No possiblility that this is just total crap and that's why it's incomprehensible.
It's actually a liberating feeling when you realize that, if you put in the time and effort, you CAN actually understand some truly deep ideas (physics, biology, philosophy, whatever interests you.) Yeah, maybe you'll never know everything, but you can sure as hell rule out garbage like the stuff WT spews out there.