I think many people would love such an option.
There's one little problem with the proposed solution since it forces several flow paths into one knot, which in this case acts like a blank state.
An ideal solution which would require more work on the UI front and the calculation of geometric curves would allow paths to run in parallel around a knot, acting as a roundabout, but never fusing into each other.
This drawing function is in fact a separate concept where the smaller, and perhaps older and with the highest starting point, would be located inside the curve, and any further line that would have occupied the same line space would now position itself with an offset of a few pixels, creating concentric lines.