I would have much preferred to have an actually qualified person running our nation's nuclear program, but... I'll take a cautiously-optimistic non-expert over a lot of the other secretaries who are aiming at destroying their specific departments.
The FCC is a good example of active destruction from within. All those Robocalls you've been getting the past year or two are precisely because of the new FCC Head refusing to do his job to punish robocallers. The fact of the matter is that only the FCC has the authority and power to effectively police Robocalls, and ignoring those responsibilities leads to the annoying situation we have today.