The FPV crowd by and large do not know about or embrace the AMA, so why should the AMA embrace the FPV crowd, when it is to their detriment?
FPV started with the AMA. I remember in the late 90's that members were putting small video cameras with small transmitters. The problem is not with those people but the ones who buy ready to fly FPV planes and copters (usually a quad copter). They are the ones completely ignorant of the rules. So to me the AMA is not embracing something that started without them but something that was with them all along.