SaltySinus said..Is it just because if you ditch it, it's a pain to relaunch?
If you're bigger, you can hold down more kite for longer and still be grinning . . . unlike the "average" kiter of 75kg. As wind strength increases as a square of the speed (IIRC!!!) then just a few knots can make for a big difference, if you're a featherweight.
Perhaps it's relaunch . . . this month in Thailand, I watched a guy with a Reo 12 spend lots of time just pulling on a rear line, trying to get the kite to relaunch. No joy.
One of our light wind morning sessions, I got sick of downwinders so we all swapped our gear around. He took my Flite for a run and I nursed his Reo. Thought I might have a go at relaunching it, see if I'm better than him

Nope, no joy just hauling on the line . . . hmm, wonder if the ol' front line/opposite rear line trick would work - yup, almost instant relaunch!
. . . perhaps they consider that an "intermediate/advanced" technique?
That's one reason I really like the Ozone bar - low split.