I believe that's the most common aiming method -- "goulash". And everyone makes their own based on what looks right, what feels right, and what works for them. My goulash might have different ingredients than yours, but it's still goulash.
I never used fractional aiming or contact points. I guess, if I had to choose, I more or less learned the game naturally, which I think is ghostball, imagining where the cb needs to be and then lining up and stroking the shot to make it happen. Do that for countless hours and you get pretty good at it.
Sometimes I look at the contact point on the ob, mainly for thin cuts, and also to help visualize the tangent line sometimes. And now, after coming up with a better fractional system than the old "Quarter" system, I find myself using fractional aiming more often, and not the type that requires guesswork. But I don't use it 100% of the time, just as I don't believe anyone uses just one method 100% of the time. On the surface they might think they do, but deep down there is prior knowledge/experience at work also.