Actually, think about it. If it worked the physical universe and this spacetime experience wouldn't even be here.
Remember when he wrote "for too long I've born it alone" - "it" being the onus of Clearing the planet. This is the sales pitch on why we all needed to train because the...
If Scientology worked as advertised David Miscavige would've been ferreted out a long time ago.
I especially like the theories of Miscavige corrupting the comm line to Hu666ard to fool Elron Elray.
When you're exterior with full perception why do you need a messenger?