I think that question can be asked at more than one level ... starting with "Why is there so much antagonism toward DIR"? I have to deal with that a lot ... and being someone who really would prefer to promote the concepts of safer diving, I'm not always pleased about the answers.
Much of the reason pertains to the topic of this thread ... and a mentality that spawns a lexicon of terms intended to demean people.
It's really rather unnecessary ... and self-defeating ... in the long term.
... Bob (Grateful Diver)