lol. Yeah. I understand where you're headed, and I fully acknowledge the idea of lifelong learning. But even a 1st year resident can Perform a successful surgery after 4 years of training and a little ojt. You took great pains to describe the difficulty of successfully applying aikido for all but the most skilled.
Once again, I'm not reacting to the length of time. I'm reacting to your own description of the unlikeliness of success for all but the most experienced.
If it's taking an incredibly long Time for students to achieve even fundamental success, it's one of three things. either the training is inherently flawed, the trainees are in over their heads or you're learning something other than what you think you're learning.