the old farts are really worried some kids are gonna break their necks trying to avoid being thrown, and want to discourage the problem from the top-down.
i can understand that. it'd be hard to bring new people into a sport where people run the risk of paralyzing themselves while attempting to circumvent the rules, and that's not even mentioning the concussion risks...
but like i've said, it blows my mind that guillotine chokes 'endanger the neck', yet we've also basically said that certain throws that may spike uke onto their head/face fall under the 'eh, shit happens' category...
getting thrown ass-over-head endangers your neck. period. far more than a fucking guillotine choke.
anatomically, your head bends in that direction.
were i king, the rule would simply be "any techniques that intend to hyperextend or twist the spinal column are illegal" - no twisting neck cranks, no reverse guillotines, no twisters, no lion tamers, no atlas cranks, no can openers.