Yes the book represents knowledge that one can’t come up with themselves. NPC learning would be a more accurate but less likely for the player to run into. I have no problem with that, well I do, but more as a concept for this specific area, then actual protest for this being a method to learn anything, advanced throwing included.
throwing is a very natural motion,with few ways to improve upon, using only the arm. I am “fixated” on damages because that is the only example you have given, and I would like you to extrapolate on why the damage would be a reasonable thing to add. I have less problem with the kind of examples I gave, like reduced aim penalty for movement, and things of that nature. Because martial arts do teach you body movements and placement. Please also note that most martial arts are formed by ONE individual, who has such a good understanding of their body, that they invent a new way to use it in combat.
Martial arts itself bothers me, and I would love to see a rework or more tweaks done to it, if I could think of any way to change it that would be better than what we have, the only thing I can think of would become an alert panel avalanche during melee fighting. As is, I can think of no improvements myself so will live with it.
Why are you fixated on throwing being difficult? because of that vid of the amateur throwing sticks more awkwardly then I’ve ever seen anyone accomplish before?