Your theories are about as plausible as Bohls's tweets, and while he may have had some inside knowledge, you undoubtedly have none. You think coaches never leave jobs right after really successful seasons have just ended? Really? You think coaches never leave coaching at their alma maters for greener pastures? Ever heard of Rich Rodriguez? Tadlock could have left if he wanted to; he didn't. No one would have been shocked if he took the UT job then, outside of maybe some Tech fans. We're talking about the most prestigious and storied program in college baseball, are we not?
Whether or not Tadlock had any serious interest in UT doesn't matter anyway, as the discussion here is, "can UT get any coach from Tech they want?" The question is, did UT have interest in him? Certainly, no one seemed to think the idea of UT hiring him away as of late June 2016 was improbable at the time, and all the info you just cited was all publicly known at that point.