I assumed you were also meaning about getting to your nice steak some days later and getting a whiff of memory of the burning-to-death person, and being put off by the trauma from that.

The answers I’ve seen here (really good ones! Thank you guys!) don’t seem to address that directly, but it sounds from them like mostly if you work in that job you learn to push away the horror one way or another and get on with life, and steak-vs-man turns out not so different - even with, as you say, smell being particularly evocative of memories.