I don't say these things because they'd reflect badly on me. They'd drag me down to a level I'd rather not be at, because then I'd be like everyone else. if I refrain from being cruel and saying unkind things, then it betters me as well as having the benefit of not inflicting pointless harm on other people.
I really wish you could meet Cordelia. You and her would get along; she doesn't believe in tact either.