I do not think you are trolling here - I think you have brought forward some points that deserve serious consideration.
It would be interesting to see a response by Mike.
One thing that I would like to point out is that the word jin as such does not just refer to skill or power in the martial arts. Someone who is cutting trees as a trade may require a jin from this that is specific for his trade. So a sailor would have a jin as a result of sailing, a swordsmith as a result of forging metal, and so on. A sailor might be just as strong as a swordsmith, but still would not have the jin to make a sword.
I will settle for a Gin,with a large tonic water , ice and a piece of lemon, thank you very much. Joe