A real leader trains someone good enough to replace them, then doesn’t feel threatened by it.

Teaching somebody everything you know feels like handing over your position, so plenty of people teach most of it and keep a piece back. That makes them necessary and makes the group fragile. Training a genuine replacement means your worth stops resting on the one thing nobody else can do, which is uncomfortable until you notice it frees you for something harder.

Pick the task people always come to you for and teach it fully this week, including the part you usually withhold. Let them do it imperfectly once. Then go find the next thing worth being good at.