Because it goes hand-in-hand with the euphemism treadmill. I defer to the late great George Carlin's words on the subject:

  I don't like euphemisms, or euphemistic language. And American English is loaded with euphemisms. Cause Americans have a lot of trouble dealing with reality. Americans have trouble facing the truth, so they invent the kind of a soft language to protest themselves from it, and it gets worse with every generation.

Video https://www.youtube.com/watch?v=vuEQixrBKCc or text form: https://www.lingq.com/en/learn-english-online/courses/87644/...