Source: youtube I imagine. Speculation is fine but here you are making assertions without evidence.
> The battlefield transparency that drones bring is a sea change in warfare
And it began 20 years ago.
> Could NATO take a million+ casualties
This is a weird argument for the effectivness of your Russian drone infantry.
> If that Russian drone infantry suddenly showed up on Estonia's borders
They teleport now too? This is getting serious. I imagine within a week Putin would be meeting Gaddafi's fate. Attacking NATO is nothing like bullying a smaller country with no defense pacts. China and India would stop being patron states. You'd see a half dozen Prigozhins as the oligarchs would realize it's not survivable.
> The Pentagon does not see drone warfare as a top priority.
Anduril, GA, Boeing, and Lockmart absolutely inconsolable right now.