The thing is, consumer drones are widespread and generate a lot of data. Not just about the general performance of the drone or AI (like Tesla does), but also about weather conditions such as wind, or population densities that are classified by the drone's AI. All of this can be fed into massive data warehouses for later analysis - and the more drones one has, the better the quality of the derived data. In turn, that data can be used by the military for all sorts of planning and general intel collection.
Given that DJI has 76% of the market, the largest competitor (shockingly Intel - no idea they made drones?!) has 4% and the rest barely hits ~3%, it's safe to assume that no competitor comes even close to DJI [1].
[1] https://www.statista.com/statistics/1254982/global-market-sh...