I partly just figured they'd be more readily available than the metal brackets needed for secure use of calf cuffs on older stilts, however I didn't think about the support rods, they always seem to slip my notice. I do quite often switch my stilts with people though, and my legs are chunkier than most who I would swap around with. Also If they get knocked in a fall or something it means they're easier to realign, and I'm always looking for a way to carry less tools.
EDIT
Also just thought, that I could use them for a more suitable way for transporting them: Take off the cuffs and put them in a bag, or top box, them clamp the quick releases onto a set of inverted bars attached to my luggage rack: Just need to find some suitable bars now.