Isn't the role of the Administrator to administrate?
In the ideal world, we'd all like to see someone in the position who as a child had a passion for flying model airplanes, later flew real planes, now with a continuing side hobby or possibly even career of flying drones, plus a deep understanding and experience in writing useful, practical, applicable and enforceable safety regulations that actually made any kind of sense.
But in the end, I'd even settle for someone who knows absolutely nothing at all about the subject, as long as he/she is good at hiring, managing, motivating, and directing the experts who actually do know something about the relevant subjects and lets them do a good job.
It would be nice if they put someone in charge who is sympathetic to drone pilots. But really, do you actually think the Administrator in charge is going to be able to recite every regulation in the book? Do you think the guy ultimately in charge, the President of your country, regardless of Republican or Democrat, would ever be able to tell you the difference between Part 107 or anything else when ambushed with detailed questions like that?
The guy isn't being appointed to be an air traffic controller, or to fly planes, or to write or enforce new regulations all on his own. He's there to manage the experts who do all those things for him and who coach him on which topics currently require his attention on important decisions.