It's also weird to me that the Department of Energy (and not, say, the CDC/DHHS or USAMRIID or what have you) is advancing such hypotheses in the first place. What does the origin of SARS-CoV-2 have to do with American energy policy?
DoE does a lot of civilian stuff now (electrical grid, cybersecurity, etc.) but it's kind of an add-on. The first couple of national labs - places like Los Alamos and Oak Ridge - are historically related to the nuke mission.