It did seem to be a bit silly, and very Politically Correct, not that the term was in use at the time, but the sentiment was in the birth canal, so to speak. When ATOs, WIS and cordon chaps got their first sight and smell of the results of a PIRA operation (it still feels wrong to call them that) the personal effects could be fairly awful; they certainly were for me.it's a dirty dangerous business, and it's best that realisation should come to you only on the first occasion that you're exposed to it?
This isn't the place to go into all of that, but there's no doubt that the ghastly VD videos (Vietnam etc), horror pictures from PIRA own-goals, slaughtering sheep in E&E training etc give at least a veneer of objectivity to dealing with the sort of scene that any soldier has to deal with. More recent conflicts have ensured that (real) PTSD rates are very high, and it wouldn't surprise me that a great many of those cases weren't properly inoculated before the event.
Any Police force has to deal with it on a career-long basis. I'm sure that their academies do a thorough grounding before chucking the baby coppers onto the street; a number of old RUC grunts of my acquaintance were particularly undisturbed by that sort of scene (SOCOs; disgustingly sexist, racist, prejudiced in every normal way and drinkers of rough poteen).