I'm not sure what the reason is (unless someone at the puzzle palace is knocking down big money somewhere or has a promise thereof over the more expensive reusable drones) but we'd sure do well to check out the already battle tested drones and systems used by the Ukrainians.
Drone counter-warfare, counter drone warfare, and simple sacrifice attack drones sure seem to be the future of land warfare.
It may be unseemly to hunt enemy combatants down one at a time with FPV drones, but it sure seems effective. Especially when you consider the effect on the morale of attacking troops.
The evolution of drone warfare has followed a similar path to that of the airplane in warfare, first recon, then bombing, then attacking and fighting in the air and all-out ground attack. With this has come an adaptve radiation of forms specifically designed to evade counter drone tactics (fiber optically guided similar to the TOW missile to evade electronic countermeasures) and I can see the opening for 'Wild Weasel' sorts of ECM drones to jam counter drone efforts or seek and destroy sites radiating electromagnetic transmissions.
Land drones are present, too, if in their infancy, and being used in Ukraine, even if in a limited capacity. This is the next wave of conventional warfare, as much a game changer as the use of gunpowder. We would be well advised to use a leg up, and then apply our own gimmickry to improve it, without spending tens of billions and years to get a prototype.
If this means that at least some of the procurement process needs to be overhauled, then so be it. Git 'er done!