This is just offloading responsibility for making your own personal training decisions onto another person. What if that person also did the same, and so on...?
Well- I suppose you are correct, but from my perspective I have to offload that responsibility onto someone, as I do not know Aikido.
My point is that if an instructor is doing something that is puzzling or counter-intuitive to me, I am willing to still try and learn from them. I highlight that as a lesson I have learned because Aikido seems puzzling to me at times...not sure if I'm on a limb on that one.