It's a truism, like extramarital sex being a sin.
You can just repeat it over and over with various adjectives thrown in and use it to rhetorically beat someone until they just get tired of trying to have a conversation and leave. Then you can feel like you won something.
What hypocrisy are you referring to? Are you saying that just because nobody is perfect, that it is wrong to point out that illicit sex, what to speak of homosexual acts, are wrong?
I don't get your point. Other than I'm wrong for saying that illicit sex is wrong?