People can claim whatever they like. That doesn't mean it's a good or reasonable hypothesis (especially for one that is essentially unfalsifible like predictive coding).
I'm not trying to advance a testable hypothesis. If you think the unfalsifiability of my claim is a problem, you haven't understood what I'm trying to do.
My claim is that the two concepts are indistinguishable, thus equivalent. The unfalsifiability is what makes it a natural equivalence, the same as in the other examples I gave.
The problem is that we don’t have a good understanding of what “thinking” really is, and those parts of it we think we do understand involve simple things done at scale (electrical pulses on specific pathways, etc).
It is not unreasonable to suspect differences between humans and LLMs are differences in degree, rather than category.