The quality of your team, their performance and contributions are directly related to you as a leader. In a sense, they are a reflection of you. You set standards, expectations and instill values across your team and as such you need to use caution in the initial selection process. Furthermore, you need to provide them resources they need to be successful.
Finally, you need to take the brunt of any attack coming their way as that is what leaders do. Your team gets the credit and you take on the blame when necessary.