As members of a social species endowed with large brains, we are natural-born marketers. Capitalism, the economic system that has elevated innumerable people out of abject poverty and misery, is founded on marketing. Everything that defines your daily existence has the indelible marks of marketing on it.
There are justifiable case-by-case situations wherein an educator might exhibit targeted sensitivity to a student's unique circumstances. This is humane and laudable. In most instances though, trigger warnings are not a manifestation of justified empathy but are symptomatic of an ailing culture.