I don't think it's a skill issue since it takes almost zero skill to use AI tools. It's more of an ideological / desire issue. These people don't want to use AI tools rather than they don't know how.
I've done interviews where the person being interviewed just piped the task.md file in to claude and we sat there in silence for 20 minutes where claude completed the entire task. What is even the point. I preferred the people who did it all manually because at least I saw them understand something, I'm sure those people could also type "Claude, implement everything in the task.md" too.
But perhaps other interviewers actually do want to see you hand the whole task off and wait.