We're putting a lot of faith in tools that can best be described as immature. I don't think it's out of the question to get A.I. (not speaking of Watson, which is A.I. adjacent) to the point where it can perform perfectly at human intelligence tasks. The point is to have these systems perform better than their human counterparts (at least, I think that should be aim for something like Watson for Health). The people who built these things are learning themselves. As we make more progress in technology and AI, I don't doubt that we could break that barrier. There may be an upper limit because maybe the human brain is incapable of solving some problems, but even there I think it's not difficult to imagine workarounds. Simply put, I don't think the answer is to think these problems could never be solved.

Additionally, human-assisted A.I. is not the solution, it's a non-answer to the problem of creating systems that can think and perform at human levels of intelligence. It's okay to admit if we don't have the ability to make these things, but its disingenuous to believe that human involvement in helping computers get to the right answer is the right answer. Though yes, we need this right now to move things along where they otherwise might stand still.