It's not that it can't or shouldn't, it's that it won't: because there's no reason for it to. Everyone uses the .com, everyone wants the .com, and the only reason you'd register anything else is if you can't get the .com. Everyone knows this. That's why the options are: the .com or an alternative.
What do you mean "innovation?" We're talking about domain extensions, not technological advancement. .ai is just the ccTLD for Anguilla. It's a cool gimmick for AI-related businesses and services, but that's all it is.
You were making an analogy relating to technological advancement, which is completely unrelated to the topic at hand.
Justifying your position with vague allusions of how "things change" and of how "tomorrow is unpredictable" without giving any reason for why it would change, only makes you come across as a bullshitter.