The thing is, the domain is often more difficult than the actual implementation. And often only a subset matters (different for each task). So I’m wondering if teaching the AI the correct subdomain is indeed faster than just code the solution.

Also trivial work can benefit the coder. Like a light jog between full sprints for your brain. Reviewing code can be more taxing than writing it as you need to retieve the full context at once instead of incremental steps.