One of the best managers I've ever known described herself that way.

She may not have been a great engineer (I'll never know), but she gave us the tools we needed to do our job, shielded us from the upper management pressure and BS and got out of our way. In return, the team shipped a ton of functionality in an impossibly short timeframe that she later confessed she never thought we'd be able to achieve.

Excel at what you're good at and the rest tends to take care of itself.