Additionally, based on your wiki, Brown wasn't immediately simply given the administrator position in FEMA with his only background being the IAHA. He was FEMA's General Counsel early in 2001, then acting Deputy Director in September 2001, before becoming the permanent directly in March of 2002, and then the actual Director in January of 2003.
So by the time he was "The administrator" of FEMA, he absolutely DID have experience in actual disaster relief...as the Deputy Director and Acting Deputy Director of the agency for 2 years prior, and tangential experience prior to that as their general counsel.
If there was going to be a position to suggest he had "0 experience" for, it'd have been the Deputy Director position. Which, in reality, would be relatively inaccurate given the nature of how government agencies work, as experience within that government agency IS experience at least somewhat related to the job of running said agency.
None of this means that I think this needs anything more than perhaps this guys resignation, and perhaps not even that. But there seems to be some significant facts different between the two, and from the way you're presenting it.