In the black hat talk he says the only solution is full automated defense which is essentially hand the AI the keys. That’s checkmate right there. Literally the plot to Terminator/Skynet, but he’s right, there isn’t any other option. Offensive AI is too fast for humans.
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There are other options. More air-gapping (especially backups) and compartmentalization, less internet. Hire more security engineers and put one in every team (actual security, not the compliance guys). Also more onprem work, less remote, less offshoring (meaning less networks overall). Those things may be unpopular and eat into profits, but that's not the same as "no other option".
And the thing they're already doing, deploying AI to find vulnerabilities and harden software is a less dangerous use of the technology compared to handing it the infra keys.