The tolerance for path making has rounded, averaged, how the line looks. This might be detail damaging and not for everyone's style. But it might be just what the doctor ordered for whipping out a lot of sketching and still being able to get a clean result by the end.
The path is scalable. The line would be as clean if the path was scaled to quadruple size and then filled.
Added, the original from the top post so you can toggle between the two.