I cannot believe we’re having the Flipper Debate again over a decade later. 😄 Ady removed the flipper arm after coming to the same conclusion the original crew must have, that it just begs the question of how he held a gun in the first place. But instead of following the original crew’s “just throw any arm on the floor”, Adywan made it the good Doctor’s. There’s no reason for him to change that.
There is a reason. It’s canonical and it’s the correct character from the original film.
You may disagree, but don’t say there is “no reason”.