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.