I agree. Bo techniques can be transferred to virtually any blunt weapon. Plus, most kobudo styles also include jo(4ft staff) and the short sticks similar to kali (can't remember the name for them). Training in tekko and yawara and various other fist loaded weapons can be transferred to any small item you pick up.
All this being said, Most koryu okinawan kobudo practitioners don't study it for practicality!
-Al