Afghanistan as a humanitarian disaster would open up the options for providing aid to 'at-risk' Afghans who supported the U.S. military during its 20-year involvement in the Afghan conflict.

References

International Crises and Disasters: U.S. Humanitarian Assistance Response Mechanisms, by Rhoda Margesson, Congressional Research Service (CRS), October 16, 2015, PDF, 19 pages.
https://crsreports.congress.gov/product/pdf/RL/RL33769

Foreign Humanitarian Assistance, Joint Publication 3-29, CJCS, May 2019, PDF, 212 pages.
https://www.jcs.mil/Portals/36/Documents/Doctrine/pubs/jp3_29.pdf

Office of U.S. Foreign Disaster Assistance, USAID.
https://www.usaid.gov/who-we-are/organization/bureaus/bureau-democracy-conflict-and-humanitarian-assistance/office-us