They knew they were gonna be attacked by drones on home soil, right? Or is it standard procedure for militaries to “camouflage” their stuff deep inside their own territory? It’s probably not very easy to cover all of these planes with tires and even some metal grids (looked very ghetto, by the way).
If Intelligence knew and couldn’t do shit there will be some heads rolling as is us usual procedure in Führers Reich.
The tires are for shrapnel protection, they will prevent it flying as far and hopefully protect from shrapnel hitting them.
It’s not super effective but it’s kinda effective
Like the cope cages on their ground vehicles.
Probably even more so because the intent I believe it to deflect shrapnel from another explosion instead of stop a direct hit