In fact, mistakes should be celebrated. They want leaders to value what each does in their jobs. This means personally or collectively spending time with individuals in the work force. Leaders know when it's their time to lead. Build that into the process so that the design spec does not necessarily rule over the common sense heuristics picked up through doing something.
Leaders make things easier for their followers by taking on the hard things themselves.
Leaders endure more than their followers. No follower should be facing more pain than the leader is facing. In organizations with poor leadership the leaders don't do this, the hard things fall onto the followers, the leaders stay comfortable, and the followers know it. The age of stock options and parachutes has disguised this rule. Today's vibes give the impression that leaders are supposed to be comfortable and protected and perk-ed.