Those 11 steps would probably take me 15 minutes.
There are a lot of small refactorings that I wouldn't consider to be worth 15 minutes of my time, so I wouldn't do them.
Outsourcing those to an agent means I don't have to make that tradeoff, which means I can get better quality code.
But yes, for a lot of my work I'm now a Claude Code / Codex first developer. I run Zed so I can navigate the code and occasionally make small edits.
When you make the change on an IDE, you:
1 - Find the code
4 - Move the code
10 - Change the documentation
You don't do the other steps because it's deterministic and always correct.
Presumably you're talking about statically typed languages? I mainly work in Python and JavaScript.
I don't trust any refactors until I've seen the test suite pass.
(OK, sure, "rename method" might be OK, but most of my refactors and design changes are more interesting than that.)