This thread is a really good example of why poker is profitable.
Player X (who knows 0.5% of GTO) is arguing with Player Y (who knows 0.6% of GTO) about who knows more, completely wasting time/energy.
Neither player is able to see how infinitely small their knowledge is compared to what they don't know and also what they don't even know that they don't know.
Stubbornness (especially in regards to "knowing") is a major hinderance to results.
The ideal opponent is one whom thinks they know what they are doing, and has many blind spots.
The only thing I know about GTO is that I do not understand it, and that's OK.
I also understand that the typical MTT player is going to make such horrible mistakes over and over again, that GTO/any advanced theory won't be applicable.
Seriously, it seems much more advisable to simplify your game and make sure you are picking "good spots." One big insight I quickly had was how many 50/50 or "close calls" you can simply avoid, and still be OK to make a deep run. As a beginner, you can simply take all the easy spots that are no brainers and work in spots from there. You will likely go too far and have to dial it back a bit, but this is how one gains perspective and intuition as to the proper push/fold spots while shortstacked.
Poker is funny, we can really overanalyze it at times and get "caught in the weeds." It's not that hard, don't make it more complicated than it needs to be.
Also, trying to be correct and prove other people wrong is just silly. Almost as silly as an online badge to "prove" competency. If you truly believed in your abilities you wouldn't have to prove anything to anyone.
I'm not claiming to know anything, and that's the point.