Well, yeah, because it is! being an engineer myself(and having countless record engineer friends) I can tell you that LOOKS are the smallest reason the professional guys ridicule the hifi crowd.
The primary reason is the absurd claims(cable differences, freezing cds, cd pens, tuning fuses, vinyl demagnetizers, mpingo discs, mana stands, cable elevators, some of the vibration control products, the claims that various valve types (in the same amp circuit) impart "night and day" differences(valves dont have a sound. the amp circuits do...no valve has a "sound" you can pin down") , belief in SET amps, anti digital, the list goes on and on and on) ., THOSE, coupled with the whacko marketing, absurd markups for equipment designed around ridiculous "design" principles(that have no basis in science) and the nature of audiophiles in general(who seem to care more about box swapping and endless tweaking than about music, one massive wang measuring contest)...... are the reasons why the hifi crowd is a laughing stock amongst audio professionals.
at least aesthetics/appearance is *some* sort of reason for paying absurd prices(well, not really, but more of a reason than some of the idiotic ideas these "designers" have IE designing by ear, shunning measurements, etc)
it is the only group of people who, when given facts, facts that cannot be refuted... will not only choose to look the other way(so that they may continue tweaking and spending money on worthless things) , but *agressively* fight the facts, and call anyone who cannot hear these imagined differences "tin eared" (you dont have golden ears like us, etc)
the obligatory mandatory youtube post.
http://www.youtube.com/watch?v=BYTlN6wjcvQ