It’s kind of like if Qui-Gon never tried to use the mind-trick on Watto. You have this power introduced earlier in the film with him successfully mind-tricking Boss Nass, and so thankfully somebody realized that you needed to explain why that wouldn’t work a second time to just free Anakin and repair the ship. Granted, the explanation given was shitty, since all Watto needed to say was “I am not a weak-minded fool” instead of “I’m a Toydarian”.

But yeah, when you introduce something like this, it feels like a Chekov’s gun that never gets resolved or explained away.