I would agree that KS is not well understood in the general horse community.
I also agree that many horse people have unrealistic “perfect horse“ expectations. They will shy away from various things that are primarily cosmetic and have a little, if any, impact on what they want to do with a particular horse. (mild cow hocks; head shape; etc.)
I’ve also watched a lifetime of “bad behavior” by a few horses that would track with back soreness. That we never acknowledged as physical because we did not understand it.
Some of the undiagnosed physical-cause problematic behavior could have been saddle fit, or muscular, that we also did not understand well, rather than spinal, or a lot of other things. But kissing spine is also on the list.
So does KS get too much attention now because we know more than we did, or did it not get enough attention before because we didn’t know?