We all have our area of expertise. Doesn't mean some are better than others just different. I have so many quilt books & magazines from when I first started quilting around 9 years ago but haven't made too many quilts from those. I have made quilts from my own designs and just recently have bought a couple of patterns as well as two books on specific types of quilts I wish to make.
I still use the good old graph paper but sometimes a pattern is no more than an idea doodled on a scrap of paper. I consider myself lucky that I have never had a problem with maths but don't consider myself any better than any other quilter. Even beginners have the potential to design or make fabulous quilts.
I'm more grateful to my Mother and a neighbour who taught me how to sew & draft patterns at a very young age.