I wouldn't have been uncommonly impressed if shokwave had agreed to use "blackmail" and "extortion" as I prefer while talking to me (although the local context makes that sort of acquiescence less likely than it would be in most social groups, I think). But the great-grandparent seems to indicate a commitment to use the words the way I like them in all contexts and to go so far as to evangelize my linguistic beliefs.

Do most people not do that?

Most people will indeed adopt different terminology, given a good reason; it's just that some people have extensive experience of others not complying with such requests because the reasons are ridiculous, and then infer such rejection to be a more general phenomenon.

Example:

A: [Activity X] will tend to make you more sexually attractive to [group Y] because of [mechanism Z].
B: You shouldn't say that because it's offensive to Ys and treats them like non-persons mindlessly responding to X, and I don't like that. And I don't like X, either.
C: Are you insane? I can't ignore real-world social phenomena that affect my life like what A described, just because it offends you and you have unusual preferences. Try to think about how others might feel.
B: Bah! Blast these terrorists who won't listen to the voice of reason! Where can I find less defective people?