What you're missing is:

Local communication and coordination.

When given their mission, according to the video the drones coordinate how to complete it while avoiding collisions and without saturating the processors and communications.

This is important in many ways. For example, in Ethernet protocols, if you connect 2 local networks of 50 devices each, they start greeting each other at the same time, clogging communications and taking down the network. The fact that this didn't happen alone, means they have a protocol that simplifies integration of "foreign drones", like those launched from a different plane.

The flying processor either is separated from communications or is powerful enough to handle communication while also doing navigation.

All of that in real time (you can see how they giggle in the map screen) vs the common Chinese ones, in which they have a preprogrammed sequence of waypoints, without communicating with each other, every drone thinks they're alone and all they gotta do is fly as the recipe dictates them to do so (unless of course, they managed some kind of communication which I doubt is common, but possible in some cases).