Spandex, your I am the captain attitude has shown throughout your posts. I always let the FO fly the way he wanted to. I only intervened when it was outside my comfort zone. Why couldn't you. Sometimes you learn from what your FO does differently.
I don't think you learned anything from your FO's, I did by watching. They had a different learning experience and sometimes you can learn from other pilots if you are not obsessed with yourself.
Try it sometime. You might learn something.