Probably true. And it might be 99% of the ones that made it past the interceptors from Jordan and Iraq. So after you filter out the ones that other folks intercepted, and the ones like you said that were going to hit nothing targets in the desert, it's probably 99% successful interceptions of a much smaller number than 300.
IMHO 99% of a small number is still an awesome success. Especially to those of us old enough to remember the egg heads at MIT and other Dims saying missile defense wouldn't work, that "you can't hit a bullet with another bullet". Evidently you can.
Most of the drones were hit with F-16s using machine guns.
Very WWII V-1 warfare.
[IMHO 99% of a small number is still an awesome success.]
Better than my food-to-mouth average.