There is nothing that stops me from explaining my understanding of what a meaningful or valuable life is. Nor is there is anytihng that stops you from explaining your understanding. We may not understand each other but by talking about the differences and similarities we may come to understand each other eventually.
Suppose the roles were reversed. If I were to tell you that your understanding was wrong and leave it at, then no matter how noble the intent, there is nothing for you to accept this argument by but my authority. But what authority do I have? I might be wrong. Or I might have simply misunderstood you. But if I never actually engage in a discussion, how will either of us known?
To tie all this back to the discussion concretely. Perhaps the explanation alone will not suffice to grant a complete understanding. This is not a reason to forgo an attempt at explanation. Nor is it a reason to forgo any actual criticism of the description in the FAQ. The only thing it will do with certainty is create more conversation.
edit, regarding your edit:
If you take the paragraph that follows your definition:
"This is not an easy concept, I know. Imagine being able to feel with all of your senses the relentless alien terror that is God and your place in it, which is everywhere and therefore nowhere, and realizing that it means the total dissolution of your individuality into boundless being. Imagine that and then still being able to say “I”. The “I” is the Tower."
and another relevant part of Vehks teachings:
To transcend mortal boundaries set in place by immortal rulers. At its simplest, the state of chim provides an escape from all known laws of the divine worlds and the corruptions of the black sea of Oblivion. It is a return to the first brush of Anu-Padomay, where stasis and change created possibility. Moreso, it the essence needed to hold that 'dawning' together without disaster. One that knows CHIM observes the Tower without fear. Moreso: he resides within.
And compare it to the Guide:
The realization that you are just one small part of the dream of a schizophrenic Godhead, and that you therefore do not exist as an individual being, typically results in disappearing from the world. CHIM is this realization coupled with the wilful retaining of individual identity ("the ability to say 'I am'"). The texts listed above already deal with the issues of CHIM, so be sure to read them.
I find that the Guide presents a fairly accurate summary of both. So I'm curious in which aspect you and Allerleirauh find fault.