So, I've been messing around with different builds and started playing around with possible monk builds. There is a feat (ancestral weaponry) for the monk that, if you have the monastic weaponry feat, you can make racial weapons monk weapons.
Because there is a general feat for weapon proficiency, and most other races have a feat for racial weapons, it sort of feels like the universal nature of the human should make their Unconventional Weapon feat their racial feat. I can see how this might be considered a stretch, but I also feel like it plays well into the idea that humans are everywhere and get adopted into everything (or that everything gets adopted into them), so I don't feel like this would be unreasonable. However, I can't find anything in writing to suggest that a weapon proficiency gained through the human feat would make it such.
Unfortunately, this doesn't work for one big reason:
Ancestral Weaponry requires a feat that grants you access to all weapons with a given ancestry trait. Even if [Human] was a valid weapon trait (and it isn't), Unconventional Weaponry grants you access to one weapon, not all of them, so it wouldn't qualify anyway.
Now, mechanically, I don't think anything breaks if you allow a human monk to use Ancestral Weaponry to make his one weapon acquired through Unconventional Weaponry into a monk weapon (so long as it's finesse or agile). But it'd need to be something you talk to your GM about.
Thank you for the more thought out response. I agree with the premise, and being an eternal GM I mostly just wanted a viewpoint to explain on the spirit of the rule why this would or would not work. I was looking at it from the point of the fact that humans are adaptable and universal so why wouldn't their ancestorial weapon feat provide them a human trait to their chosen weapon.
Thanks again for your insight - I really do appreciate it!