The reason to do this was, when I'm drawing, I shade it by putting a stroke over the object and using that stroke as a blur. I figured to put the blurred strokes inside the object, such as this eclipse, which makes it look better with white backgrounds. It also makes it much cleaner, as in when I put objects behind a shaded eclipse, for example, all the strokes that stick out would overlay the object behind the eclipse.
I like to draw with the paintbrush tool, when making characters and objects, I find it easier to use strokes instead of converting the shape into a curve and editing it manually. However putting strokes inside of another stroke won't work, which is my issue.