Its a bit bizarre isn't it.
Not much is made of the fact that the first SHAR air-to-air vistory of the Falklands was by an RAF Flt Lt.
These type of views are so ingrained though, as though they really believe them, that it makes you wonder. It may be that when the senior ranks in the services are forced into making decisions and trade offs about what they invest in, I suspect its all too easy for them to say "well we would have had capability X, if it wasn't for the Y service wanting capability Z - not our fault, certainly not any reflection on the trade offs made within our own service etc....cough etc.". when briefing their own service on why they themselves have failed to get something delivered/prioritised.
Looks like this sort of cr*p is swallowed by the lower ranks hook line and sinker. I suggest any under funding of the FAA has more to do with Navy priorities (i.e. no. of grey ships = most important) than anything else.