I'll pretend I didn't read that, Reidy...
The left handed pen thing is about how your hand moves across the page. If you're right handed, your hand moves away from the words you've written so the ink doesn't smudge.
Lefties, however, move their hand across the wet ink - problem. Two of my children are lefties and both have had to contend with it. So lefties have to be a little more delicate in the way they hold the pen - hard for a 9 or 10 year old or younger. It's a real struggle
So the special pen is easier to hold without smudging.