His article on the matter from 2021 is quiet helpful in understanding what’s (probably) going on here: https://www.thedrive.com/the-war-zone/40054/adversary-drones...
This whole thing is just genius on so many levels. Exploit the stigma about aliens by constructing small drones and make them appear wacky beyond belief to guarantee they'll go unreported. Exploit the radar filters for small and slow moving craft with motionless soft balloons. And it worked brilliantly.
> I believe that those in power who snicker about credible reports of strange objects in the sky and stymie research into them, including access to classified data, have become a threat to national security themselves. Their lack of imagination, curiosity, and creativity appears to have built a near-perfect vacuum that our enemies could exploit and likely have exploited to an astonishing degree.