IKO does a lot of good things for the sport, but it bugs me that on this one point, they've decided that their method is the only best and safe way and people hang onto it like it's the Word of God. Everyone's entitled to an opinion, but not everyone feels that this method is best, obviously. I've had more problems and near-misses with the wrap-the-lines-around-the-bar method than with the alternate method described above. On the other hand, I've never had a problem pulling myself to the kite, along one line, after undoing my leash, and just because a group of kiters has formed an organization and decided that their way is best doesn't mean I have to listen to or agree with them. Both methods have their uses, and for me, which method I use depends on the situation.
I'm not a "religeous", I'm a rational rider AND a IKO instructor (as second).
I have to be SURE my student dont go in troubles or risk and I can explain why your "simple" methot is dangerous:
1) if the wind increase when you are in mid of the way, between bar and kite, unleashed... and the kite start to pull a lot... Do you think a 45kg girl can "keep" in hands from one tensioned line (a kite looping or dragging)? What will happen to her hands?
2) Why risk to be wrapped by floating lines all around if that method can avoid any problem about it?
3) with the way you suggest = <equal> = end_of_session, I can bet about it. All lines will be so tangled you will be happy to untangle it before sunshine...
4) You risk a boat to help you because thay not "see" a cue of lines floating in the mid of waves...
5) You should know: NEVER leave unleashed your kite, never. A uncontrolled kite can be mortal.
6) IKO method can be done force-less (about) using the bar as lever and in the same time to approaching the kite keeping order on lines. Also a kid can do that also in waves & 30 kts (!)
7) What happening if the wind when you are on kite goes very strong if you are unleashed?!??! You (generic "you") will cannot keep in your hands
and you loose your kite and you will be in the middle of ocean...
So, I practice that method much before IKO codify that and before I know about IKO. But I try to use a kite at maximum responsibility for me and the others.
A hint about bridles, when you are on the kite, on Best 07/08 models keep the upper part from a gray (thicker) lines to avoid chaps and the bottom hand on the t3/t4 depending on wind speed.