You can't seem to grasp the story itself. This was a road between cities. It wasn't a road through a land of thieves. The Samaritan's help was cash and a free ride to the next inn. The Samaritan didn't have to fight off the marauding hordes.
"That is why the story is so powerful to its original hearers.
No, it was putting up the cash that was. If you think it's so important, then you should put up the cash to make sure these climbers have enough funds to cover more manpower and equipment. Don't lay that on other folks. Cough up the cash yourself.
The Samaritan stopped and helped with what he could do at personal risk of finding himself attacked.
Trying to bend God's words in a way that makes these men unnacountable is an interesting angle.
The point of the story is each of us is accountable for our neighbor, even if our neighbor is an idiot.