Yes, I agree, Michel. Any spiritual/contemplative teaching that does not resolve the spiritual crisis is incomplete, and thus not addressing the "missing elephant in the room." On the other hand, I would think, considering the epistemology of the Pali Canon, then the 4 noble truths would be Siddhartha Gautama's answer to the spiritual crisis.
Let us take for example the hypersensitive phase of the spiritual crisis, which falls between mastering the 2nd and 3rd religious experiences. Here the mystic has stilled his, or her mind, which has allowed the development of one's sensitivity, which is needed to become aware of the charisms of the 3rd stage of the religious experience. The hypersensitivity is often extremely annoying, and can drive crazy an emerging mystic who has no skilled guidance, such as the El, who I referred to under another thread.
The solution in the 4NT is let go, and keep meditating, and following the rest of the N8P. It will work, but it does not explain why one who has stilled one's mind is suddenly finding the world an annoying place to be in. On the other hand, the spiritual crisis serves to drive the emerging mystic into the solitude one needs to further develop as a mystic. The deeper one goes into traversing the religious experiences, the more one will seek solitude.