It is possible this is the reason.
The top line is from an audiogram of someone with normal hearing sensitivity.
The lower one is from an individual with
hyperacusis. These individuals are very
sensitive to excess of HF sounds. I think this may have a bearing on this issue. I alluded to sex differences in audio perception last night. Women do trend to have more sensitive hearing in the 4 KHz region, and trend towards the lower curve above rather than the upper. I do know that it is not just the looks of speakers that many women object to, but also their sound. I know my late mother in particular was very adverse to excess HF energy in speakers in her younger years. Back then there was no omni mic or REW. I'm certain my mother was totally allergic to any reproducer that even slightly had any HF band above the "parapet". I think that had an early and over riding influence on my approach to speaker design.
I know I have a degree of this. I can not tolerate any speaker with the slightest HF rise. In fact I can tolerate very, very few commercial speakers. I'm far more tolerant of a speaker with a slightly depresses HF than one with even the slightest rise.
I should try and seek out those Klipsch speakers and see if I have the same reaction as the OP.