Practical experience matters, a lot. If you have never done what you lead it is difficult to gain credibility and complete understanding of what it takes to successfully enable progress and new capabilities in those areas.
Know what you manage
I’m a strong believer that you must know the area you are managing. You should have either moved up in that industry or took some time to actually get yourself up to speed on current practices and common knowledge. Being only a manager of people without having the necessary (even if only fundamental) knowledge directly related to the area you …