When we talk about current A.I. as not really A.I., but versions of statistical modeling, I agree. These models seem to be limited in actual abilities to actually “think”. But for these who believe that this is the best we can do, and therefore we will just see ever shrinking growth in capabilities, I believe that’s likely wrong.
The current work isn’t necessarily the only way A.I. can be implemented. Researchers are working on other models that may provide better capabilities and work more closely to what we believe is actual thinking and reasoning.
That said, there is no reason to believe that the way humans (or animals) think is the only, or even the best way to accomplish it. We may be way down in the scale of brain organization and efficiency. It’s just the way it evolved here. Birds have a fairly different way of organizing neurons. Who knows, perhaps that’s even better than ours.