Ninae, you seem susceptible to a peculiar shade of BS. The intelligence of a person only gives you one aspect of who they really are, and what they're putting forth. Basing your entire belief in a subject entirely on faith that a person, or occult account has "a ring of truth to it" is not philosophy at all. It's just deciding to pretend that the myth is real, and clinging to it beyond all reason. Some smart people use their brains for the betterment of the world. Most don't know how to use their brains, and just go crazy, which can take on many forms. Some use their brains just to make stuff up, and to see how much made-up thought they can be bought up the population (or at least a "special" population) for their own gain. Some just make stuff up to entertain themselves and others, and the same "special" population tends to take these people more seriously than initially intended.
If you find yourself having to trust a person on a topic, and not the foundations of the topic itself, then you don't have any support. You've displayed little support for the argument yourself. If you open your mind too much, and have no protection against any rogue concepts that come into it, then you are opening your mind up for a logical fallacy, philosophical disease. You need basic logic to measure the value of anything you consider believing in, otherwise it's all just window dressing in a cluttered mind.
Esoteric knowledge provides a great cultural wellspring to get inspiration from, but it's all just folk stuff that never needed proof when it was conceived, and doesn't have suitable proof in the world today. The different perspectives that you get from esoteric or occult topics is very valuable, but it's more valuable to consider the roots of why these people would create such myths in the first place. You'll find a far less hollow topic, imo.
The crust of the earth would've torn to shreds by sheer entropy, and time, by now, if the 7.6 miles thickness dug at the Kola Super Deep well was all that comprised our planets physical structure. It would've cracked like so many eggs eons ago.
The reason they can't get any deeper than this certainly isn't because there's nothing but air down there.