Kobudo Agricultural Myths?

Back in the day, we had a thread where it was mentioned that the agricultural origins of many Okinawan weapons is actually a myth--could someone outline this again? Does it apply to all Okinawan weapons?

I thought we reached the conclusion that some were farming weapons (eg. kama), and some weren't? I think we found that the nunchukas were either part of a horse's bridle, or something used to strip the bark from trees, rather than rice-flails.

Why did they need weapons when they trained to punch through bamboo armor worn by Ronin?




TTT for some more serious responses.