I enjoy that Godbound doesn't even bother with any of the hairsplitting I'm reading in this thread. You're a god of freaking Health, of course you can fix his legs. No dice rolling involved.
Even then, curses can complicate matters, and a pantheon without an applicable power will need to endeavor to make a change.
A Greater Foe could argue for a saving throw, especially if it's against their will. A Gift might not even be enough if the deformity affects their divine soul, which sounds like a good quest hook.
Now you're talking! That's the kind of stuff I can work with right there. We can spin an adventure out of this. This is fun!
Rules lawyering and ooc arguing are not fun.