Psychological safety doesn't guarantee effectiveness. It just makes it easier to find out what people have to offer. Sometimes, that's a happy surprise. But when people feel able to express themselves, and you find that what they say is not adding value, then you have a responsibility to help. To coach. And even though it's not fun to give people that kind of feedback, it's better to know that someone is in need of it than to remain in the dark. Moreover, it's only fair to let your colleagues know that the impact they're having is not what they're hoping it is.