A straightforward reply wouldn't work in this situation because OP did not make a straightforward comment. So we use those terms because they are rhetorical terms that describe the techniques the original poster was using. It's easy for someone like OP to make a dishonest argument and mask it as an honest one, so we are calling him out on that dishonesty by showing the flawed arguments for what they are.
I think it's not something typical of conversation here, but it is typical of rhetorical conversation, and you'll hear this kind of speech whenever people discuss logical and rhetorical arguments.