You're right that there's many self proclaimed official airsoft groups, but the sum total of what they've contributed to the hobby is ⅘s of fuck all. If I had a pound for every time a new organisation popped up claiming to be the saviours of airsoft, only to never be heard from again I could probably afford a TM NGRS upgraded by DCA.
As for other shooting groups, they'll often try to distance themselves from airsoft and in the past have seemed to deliberately throw us under the bus in an attempt to save themselves. To me this is very short sighted as many airsofters are interested in other shooting disciplines.