There might be a few layers to this one. Drones are becoming a central part of strategic production and the US doesn't really have many competitive companies manufacturing small ones at volume.
They need to force the domestic market to build up local expertise and manufacturing capacity in the event that small drones are the direction warfare ends up going more broadly.
The us defense apparatus is still on the fence about this given that their volume of use in Ukraine could be more of an aberration due to the respective industrial bases and static nature of the war. That said the numbers are insane enough that they warrant some action just in case.