Niether really ...
The instructors who wear the trappings because the school insist have no choice anyway and the ones who do even when they don't have to, tend to be prats ... but then, even prats can be good or bad teachers
Looking back, the best instructor I had IMHO was a woman. Not sure if that means anything but it may be because women don't seem to be as egotistical as men. The best male instructors I’ve had were all old and experienced (nothing to prove?). The only common factor is that all my instructors save one didn’t wear the trappings … the one that did was useless! … but I don’t think he either inspired or intimidated because of the uniform.
SS