1. The discussion setup where you imagine a counterfactual is given by magic does not entail that magic can do any other thing you choose.

My question was a sincere ask to define, in this scenario, what is prohibiting that other magic?

The thought experiment was not assuming AGI, but something like an old school perfect expert at a given task. Maybe like C-3PO only useful as a “protocol droid”, but fairly useless at everything else

Then it’s answer number two.