Unless you have any evidence suggesting that one or more of the variations of the Church-Turing thesis is false, this is closer to a statement of faith than science.

Basically, unless you can show humans calculating a non-Turing computable function, the notion that intelligence requires a biological system is an absolutely extraordinary claim.

If you were to argue about conscience or subjective experience or something equally woolly, you might have a stronger point, and this does not at all suggest that current-architecture LLMs will necessarily achieve it.