Yes you can learn the harness, that's a tool. But it's not the important part.
I am not anthroporphizing them. I am just saying people are a better analogy.
> seems like developers experienced with using coding agents achieve better results than those without
That doesn't mean there is a skill involved. The same goes with people - you might just be naturally charismatic and get stuff done better with people. Doesn't mean it's a learnable skill that applies to everyone and every use case.
It's absolutely a skill. That you're putting this up as "charisma" simply shows you have not explored agentic engineering.
If you are indeed interested, this is a good beginner: https://simonwillison.net/guides/agentic-engineering-pattern...