For some, that's just a cop-out excuse to keep being a malicious asshole. Growing thicker skin isn't always the solution. Sometimes being tactful with the truth will get people to want to listen to you, whether you're right or wrong.
No, growing thicker skin isn't a cop out. People need to stop whining everytime someone say or do something they don't like. Learn to deal with the problem instead of becoming a fraud. Not saying everyone, but a lot of people suffers this. One of the reason I hardly post here is because people can't handle what I have to say.