Exactly, SA gets extremely repetitive after doing it for months and if you can't do it on auto you have to pay attention and you are bound to make a mistake on difficult once in a while which leads to failure and then you have to waste more time doing the same boring thing over and over with the same line up.

I would prefer every SA to be doable on auto as i dread having to do hidan difficult since i rate it on the same level of enjoyment as watching the paint dry or enjoying a fork sc* the surface of a plate.

Here's a video for reference https://www.youtube.com/watch?v=eeRT1SyuYKg (WILL HARM YOUR EARS)