"Let's focus on the worthwhile parts of what he's saying" is a silencing technique used against those who complain of sexism. Specifically, if someone's message contains some sexism, or someone's behaviour is sometimes sexist, people are exhorted to focus on what is worthwhile in their message, or the positive aspects of their behaviour, and ignore the sexism. Instead of being ignored, sexist content or conduct should be treated with at least as much serious consideration as a factual, typographical, or grammatical error.