I don’t understand what that expression means. Never have.
It goes without saying that we should speak no evil. The Buddhist concept of right speech says so. But the notion of willingly not seeing or hearing evil, of turning away from evil and pretending it is not there? Unacceptable. I hope that’s not what the expression means.
It may not fall to each of us to be the person to redress a particular wrong in the world, but I believe each of us should do our part to be witness to wrongs and to the need for them to be dealt with. Self-imposed blindness and deafness are forms of complicity. We may not be called to fight wrongs and make them right, but we shouldn’t aid and abet them, either.