In many cases leadership are best when they're effect-neutral on the performance of a company/project/etc. Consider coaches of two sports team: if they're both

In many cases leadership are best when they're effect-neutral on the performance of a company/project/etc. Consider coaches of two sports team: if they're both equally good, their effects wont be noticeable from the performance of either team. In a competitive environment, leadership ought wash-out if its any good. It's only bad leadership which will be noticed.