On Thursday, March 27, 2014 9:24:49 PM UTC-7, Ramy wrote:
Perhaps the RC folks believe it is as common to crash a glider as it is to crash an RC glider...
Ramy

It's a combination of that and cost. They feel there is a certain risk and that flying RC airplanes, gliders, helis and perhaps FPV fulfills their aviation needs safely and at much less cost.