This assumes that the AI bros care about building useful products. They don't for the most part, they care only about building a startup that can plausibly get

This assumes that the AI bros care about building useful products. They don't for the most part, they care only about building a startup that can plausibly get VC funding. So what if in five years your LLM on the blackchain app fails, you got to blow throw a few million dollars over a few years going around to conferences and living the high life. That's a success in anyone's book.