You took a Christian turn at the end there, mixed with some Hinduism (God using his Creation to know himself). Zen’s deflationary view of reason would certainly be a more spiritual approach than the combative casuistry of much Christianity.
I’d agree there’s some arrogance in secular intellectualism, but I don’t think the mystical view that all human reasoning is illusory is sustainable. As I say in the article, scientists also show the success of their reasoning, with the technological applications of their theories. Technological advances aren’t illusory, or if they are, so are all natural events, in which case the mystic’s use of “illusory” would be empty.
Yes, the mystic means to contrast ordinary perceptions with the altered, peak states of consciousness or with the contact with “the great Mind,” but without some mystical reasoning or theorizing, the preference of that experience of unified consciousness to the ordinary experience of nature becomes arbitrary.