Sarcasm, irony and euphemism are modes indirectness, like gallows humour, to help us talk about the horrific without the equivalent of burning our eyes out staring at the sun. It's a coping mechanism.

Sincere and explicit statements of horror have paradoxical outcomes because such words wear thin. They are overused by the disengenuous to wound others. The sincere are forced onto a semantic treadmill seeking different ways to express themselves.