I think you'd understand how I can take your argument to its extreme conclusion and justify posing psychotherapy problems to candidates.
You're seeing complaining where there isn't any. It's in the employers interest to ask questions that will narrow down candidates in a way that best fits the job. Putting candidates under extremely unusual circumstances and pressure to answer unrelated questions is only going to help you know how the candidate responds to unrelated questions under extremely unusual circumstances, and pointing this out is not complaining. Acknowledging that a high pressure phone interview does not accurately reflect your abilities is not complaining either.