I've always disliked this argument. A person can do something well without devising a general solution to the thing. Devising a general solution to the thing is a step we're talking all the time with all sorts of things, but it doesn't invalidate the cool fact about intelligence: whatever it is that lets us do the thing well without the general solution is hard to pin down and hard to reproduce.
All that's invalidated each time is the idea that a general solution to that task requires a general solution to all tasks, or that a general solution to that task requires our special sauce. It's the idea that something able to to that task will also be able to do XYZ.
And yet people keep coming up with a new task that people point to saying, 'this is the one! there's no way something could solve this one without also being able to do XYZ!'
All that's invalidated each time is the idea that a general solution to that task requires a general solution to all tasks, or that a general solution to that task requires our special sauce. It's the idea that something able to to that task will also be able to do XYZ.
And yet people keep coming up with a new task that people point to saying, 'this is the one! there's no way something could solve this one without also being able to do XYZ!'