>CoC assumes contributions are primarily due to the conduct of the community and not the intellect/interest of the contributor

No. That you choose to read into that this way doesn't make it factual. I'd even argue that someone that doesn't behave accordingly (with a sane CoC) doesn't show that much "interest" in a certain way. A contribution shouldn't be accepted on the sole basis that a person actually respected the CoC, and it's never been the goal of this. But it's another condition now.

> The quality of a community isn't primarily measured by its conduct but rather its accomplishments

Measuring the two is a possibility. That you don't, yourself, include the conduct of a community in your measure of its quality is your choice and yours only.

I'm curious as to what led to this broadly wrong evaluation of the situation. What lead you to believe that?