We already delegate accountability to non-humans all the time: - CI systems block merges - monitoring systems page people - test suites gate different things
In practice accountability is enforced by systems, not humans.. humans are defintiely "blamed" after the fact, but the day-to-day control loop is automated.
As agents get better at running code, inspecting ui state, correlating logs, screenshots, etc they're starting to operationally be "accountable" and preventing bad changes from shipping and producing evidence when something goes wrong .
At some point humans role shifts from "i personally verify this works" to "i trust this verification system and am accountable for configuring it correctly".
Thats still responsibility, but kind of different from whats described here. Taken to a logical extreme, the arguement here would suggest that CI shouldn't replace manual release checklists