Problems like the one discussed also aren’t interesting to applied mathematicians, either, because of lack of applications.
But yes, if this kind of AI produces new materials, solves diseases, etc. they will be very useful. We wouldn’t care whether they arrived at those solutions through valid reasoning, though. A sloppy AI that has better ‘guesses/intuitions’ than humans or that can guess and check ‘guesses/intuitions' for correctness faster would be very useful.