I'm not saying it is a gotcha. I'm saying you kept acting like our point that you had these hard lines you were not willing to discuss was completely fabricated, but you keep saying you have them. As I said before, you seem unwilling to be open to changing your mind, as evidenced by the fact that you literally say you will not change your mind (unless there is a change in the rules text regarding Thief Fast Hands)
This isn't about making things up as you go along. This is about the difference between making a decision long before a player talks to you and being unwilling to alter your position, and entering into any possible discussion with that player with the mindset of "I have made my decision, it is final, I am willing to tell you my decision, but I am not willing to change it"
You keep pointing to the books, like that means anything. We aren't discussing "how it has always been". We are discussing "how it might be" and "what is possible to do". You can't dismiss the discussion by just saying "The books give me the right to do this."
You do keep responding to me though. And to the points I'm raising. If you aren't discussing with me, but instead discussing with a strawman set up on some hill, then that's not really engaging in good faith. Also, you are responding to a general question, yet expect "I do it this way" to dismiss the premise of the general question? Sure, you've said I can do whatever I want... but you have ALSO said that the DM must be the final authority as empowered by the rulebooks and the last half century of the game. So which is it? Is it possible to DM differently, or not?
I'm not talking about always. See, you keep taking my position and making it more extreme. I never once said a 3rd party is ALWAYS the final authority. I said they COULD BE the final authority. It is possible. And if it is possible for them to be the Final Authority, then it is possible for the DM to NOT be the Final Authority.
If your only response to "it can be different" is "but I've always done it this way", then that isn't a very good rebuttal. And again, you keep claiming I've not been specific enough in my response on what to do when a difference of opinion comes up, but I've literally told you exactly what I would do. Repeatedly. I can't get more specific, because a discussion between two people involves having a discussion with the other person. It is like going to someone and saying "in a match against another person, what precisely will you do"? Anyone with any degree self-awareness will recognize that they cannot answer the question without knowing what the other person will do, because their actions will change your responses.
And the most frustrating part of this, is you changed your answer here at the end. Now it is "unlikely to change" rather than "it's not going to change anything"