> The answer to why it makes sense in that case, is that there are so few other viable alternatives to deal with swarms of drones (none currently).
There are - if the AF was functional. Any viable alternative has to have the same form - low price, and distributed - from none of the Military contractors.
One bullet may not be enough unless it hit the flight computer.
When the navy shoots bullets at a incoming projectile, they pretty much create a wall of lead (Phalanx).
Even if you could shoot one bullet, one bullet could go through it and into the window of a high rise office building.