I mean, it refutes the argument. Everyone has access to the internet, to conv nets, to C/python/pandas/TCP, you name it. Yet, nobody would seriously argue that one can not build a moat with products based on those stacks for the reason that everyone else has access to the same stack. Its just not an argument, at all.

We can now write software that interprets language under the hood (to some degree). The value propositions enabled by this change in the world are so vast, and partly so complex - to make absolute statements like "yeah but you don't control the model, so anyone can copy your solution" seems out of touch to me. What subset of technology doesn't get reverse engineered? Either this applies almost nowhere (because every piece of tech that an engineer can get their hands on is effectively open), or everywhere.