If you really want a graphic visualization, maybe you need something like a color wheel instead of a line.
There are thousands of "issues" out there. For each issue, there is often a spectrum, not a binary, range of opinions.
E.g., believe it or not, you could probably find both someone who is generally a democrat, republican, fascist, communist, or libertarian who is against abortion, and another for it.
So even a color wheel may not suffice. It's a multi-dimensional problem so you'll need to brush up on linear algebra and matrices.
LOL! You are absolutely right as many humans are less binary on many things and more gray-scale on many others-but at the bottom of it, there may simply BE no “perfect” answer.
I did struggle a bit.