I like this definition of a system because it does exist "everywhere one looks for them". If you're unable to look for anything new I would venture to guess you'll find nothing new.
I played a lot of my best matches subconsciously and to explain some of the shots I was able to pull off in that state does seem like magic. I can't even try to explain some of the phenomenal things I've seen in the midst of a 20 hour session, but there are people that have witnessed these things and even to them it seemed "supernatural".
I guess it's comparable to some of the things people can do under the influence of a deep hypnotic trance. I just think it's better to learn to do it than try to learn how to explain it. I've had to learn how these phenominons occur and it's easier to do than to explain. I know one thing that's sure in my mind, there's a system for dong anything difficult, consistently. That goes for driving, sailing, golfing, or even getting along in a relationship.
If you're really struggling to improve and you don't believe in developing a system, then you actually don't believe in improving. The mind can pretty much achieve what you can conceive so make sure you at least "think" you're improving every day. Sometimes we just have to "fake it, til we make it". 'The Game is the Teacher'