In this future, there are no more guns, only lasers Gamma do use as weapons, because bullets, doesnt affect demons, who are ethereal beens , but good point. The metaphore is that hands with potential but that for whatever reason cant seem to work, are usless untill you use them to do good, but its better than to have healthy hands that doesnt do anything , the curso is that they hurt until the point to almost give up. He wasnt using his full potential.

That particular quote made me think about :

James 2:14-26 NKJV - "Faith Without Works Is Dead"

You found a cool fact about this. Thanks for pointing this out, you are literally a genius man. Im impressed.