I don't think Geohot has a good idea about LeCun and Hutter's views on the limitations of LLMs. I think that on abstract, textual domains, LLMs perform superbly, and they would agree. I am not too well-informed about LeCun and Hutter's views either, but I think that:

LeCun thinks that LLMs are a bad fit for AI that understands the physical, dynamical systems that we inhabit, and that understanding this is necessary for AGI/ASI.

I don't know that Hutter is bearish on LLMs, but Hutter is interested in AI that can reason exceptionally well given infinite compute, and approximations of such a reasoning AI. I think he is open to the idea that LLMs can be such an approximation.