Hearing God’s voice should never be an excuse to put ourselves between He and someone else. We should also never allow people to put us there. The intimate, one of a kind relationship God wants with us is also what He wants with everyone so why would we want to hinder that by getting in the way. We are called to encourage others towards Him. If we are given a Word for someone we need to be extremely careful in how we present it and ask them to seek Him in order to hear it for themselves.
One point of clarification, the “Word” we are talking about is a specific thought or action relating to a unique situation in someone’s life. This is not the same as Biblical wisdom that is always applicable. It’s always okay for us to share from The Word.