"but AI is good at math now!"
Yeah, you know who else is good, arguably even a lot better at math? Humans. Volume in proved statements isn't going to get you the type of complexity theory shattering results that you'd need to break public key cryptography.

Yes AI is advancing at fast speeds. This statement might look silly at some point in the future. But at least as of now, there is more risk of a major breakthrough coming from some underpaid PhD student than there is from AI. If you don't consider the risks of paying PhD students more might have for cryptography, you should not worry about AI.

Also pay PhD students more, please.