Because it's upper limit is the best human created content. It doesn't create anything out of thin air. Just "emitting" things mixed from its training set.

Also, a machine cannot create equally complex or more complex than itself, so AI is always capped at human capacity, at most, asymptotically.

It can be faster. It can batch process, but it can't process "like a human".

For now.

Well, nature's laws are pretty resilient as far as I can see.

Laws about thermodynamics, and entropy still hold. Also, as far as I can see, no living creature, incl The Nature itself succeeded to create something more complex and sophisticated than itself.

So, I'll be sticking to my arguments, for now.