You may break the rules in situations threatening life or property (there is an exemption for this), but why send potentally inexperienced technicians INTO a disaster area to drown out potential calls for help when you can send generals or extras who have more understanding and experience?

Communications isn't an all hands on deck problem in the same sense that providing resources and shelter is. Ham nets and repeaters can get traffic jams very easily in a situation like this, so it's better to send a dozen experts than 100 beginners.