Let me put things in perspective for you. The first human being reported to have become enlightened - Buddha - is said to have lived 2,500 years ago. Now I personally don't know if this man really existed or not, belief in him is not required. But the point is that ideas about enlightenment have existed for well over 2,000 years.
People back then didn't know about cosmology, physics, psychology, physiology, brain chemistry, biology, the Earth... they didn't really understand very much at all. And yet the truth of the self was revealed. Worldy, academic knowledge, while certainly helpful on the path to enlightenment, is not necessary to understand the truth. Meditation, mantra, gurus, sects, while all also helpful to varying degrees, are likewise not necessary to know the truth. Yes, not even meditation. Not really. I feel it is safe to say that whatever you think you know about Zen Buddhism and about what meditation really is, no matter how deeply you think you've studied it, is most probably completely wrong, misunderstood or just plain not known. Otherwise you would be enlightened. No offence.
Now, on that note, I feel it would be best for you to begin true enquiry in this direction, but again, you will or you won't. Although I would truly, truly love to sit with you all and keep hammering you over the head until you finally get it, it is of ultimately no concern to me what you do and I imagine that there are far better teachers than me anyway.