Any organization that vibecodes a significant amount of software in-house instead of buying it will not be reducing developer headcount. I'd bet on it.
The CTO or EngDir will not be able to run 10x10 agent-cli sessions, or review 50 vibe coded PRs per week, no matter how capably autonomous the agents become.
Sounds like a failure of imagination to me (I hope you're right). It doesn't have to be the CTO, it can be anyone who will sit there for the cheapest cost to read output while assuming the risk of it all working until they retire. Sounds glorious