I agree that it oversimplifies.

The extra space produced a visually "extra" pause.

Just as these blank lines produce an even greater separation. It's about emphasis, and it's going away (IMO) because it's a nicety, not an obligatory part of clarity and communication. Also, because early editing software wasn't complex enough to correctly distinguish between a sentence end and "Dr. Edward Jones". [EDIT: the gd HN editor removed my extra space!!!]