If a DM cannot be wrong it doesn't he/she can't be bad.
True, a DM CAN overrule anything in the game, even make goblins poop a Wish scroll every 6 hours. And players CAN stop playing with the DM and find another one.
Rules are rules for a reason. Many smart and experienced people spent many years coming up with them. Yes, if a DM had lead several campaigns already they can understand what their players want and homebrew something.
But jumping from 0 to changing the core rules when you literally have 0 experience as a DM (Larian case) is just arrogant.