That's the real trick in a trust-based system. We have multiple CAs to prevent single points of failure or control, but now that there are so many CAs, and well

That's the real trick in a trust-based system. We have multiple CAs to prevent single points of failure or control, but now that there are so many CAs, and well-known powerful actors seeking to exploit CAs, there's a need for more oversight and enforcement, which leads back to a central authority and a single point of failure and control.