That's not a great analogy: you can't do the job with your buddy; whereas some interviewers are ok with, and even expect you to, use GenAI on the job daily. Depends on the interviewer and job expectations.

A better analogy is an interview where you can use a calculator (and not be detected). If the interviewer were only to ask you simple arithmetic questions with numeric answers then sure you'd seem to do well. So interviewers adjust to not doing that.