That is how it works. 179's are just assigned to the base, not by name from AFPC, so no 3/7 day opt choice. Wg/Gp/Sq leadership is who has control of who goes on these. The one exception is if the deployment has some very unique requirements (patch, chief of safety qual...) and there are no other choices on base. Still if papers were submitted and leadership manned up for a reclamma it would likely be accepted.