Davidson does not address the issue of a public agency actively forbidding an asset being deployed which can clearly be shown to provide relief and does not interfere with the agency carrying out its duties.
Further, a well trained aircrew with an asset more properly equipped than that of the Agency seems to me to be a tough case of gross negligence.
The problem is that we actually need to debate this stuff and try to make excuses for the incident commander. By doing so we simply give the next person an excuse for a bad decision.