This is not a foregone conclusion.

Sure, I agree. There's many a slip twixt the cup and the lip. However, I've seen no evidence that it won't happen, or that humans hold any inherent advantage over AI (as nascent as it may be, in the rude forms of LLMs and deep learning they're currently in).

If you want something to reflect upon, your statement about how humans have an advantage of adaptability sounds exactly like the previous generation of grasping at inherant human superiority that would be our salvation: creativity. It wasn't too long ago that people claimed that machines would never be able to compose a sonnet, or paint a "Starry Night," and yet, creativity has been one of the first walls to fall. And anyone claiming that ML only copies and doesn't produce anything original has obviously never studied the history of fine art.

Since noone would now claim that machines will never surpass humans in art, the goals have shifted to adaptability? This is an even easier hurdle. Computer hardware is evolving at speeds enormously faster than human hardware. With the exception of the few brief years at the start of our lives, computer software is more easily modified, updated, and improved than our poor connective neural networks. It isn't even a competition: conputers are vastly more well equipped to adapt faster than we are. As soon as adaptability becomes a priority of focus, they'll easily exceed us.

I do agree, there are a lot of ways this futur could not come to pass. Personally, I think it's most likely we'll extinct ourselves - or, at least, the society able to continue creating computers. However, we may hit hardware limits. Quantum computing could stall out. Or, we may find that the way we create AI cripples it the same way we are, with built-in biases, inefficiencies in thinking, or simply too high of resource demands for complexity much beyond what two humans can create with far less effort and very little motivation.