I read the wikipedia you linked, specifically about trigger warnings: https://en.wikipedia.org/wiki/Trauma_trigger#Trigger_warning...

But your statement:

> They're to prevent panic attacks.

Seems to counter the arguments in the link:

> Richard J. McNally, a Professor of Psychology at Harvard University, while writing for Pacific Standard,[13] discussed the merit of trigger warnings noting that "Trigger warnings are designed to help survivors avoid reminders of their trauma, thereby preventing emotional discomfort. Yet avoidance reinforces PTSD. Conversely, systematic exposure to triggers and the memories they provoke is the most effective means of overcoming the disorder" while citing several academic studies conducted on PTSD sufferers.