Remove TNT damage + knockback

during raids, you would defend by blocking the cannon from getting deeper into your base by patching/blocking the path of the cannon with blocks, HOWEVER this is literally impossible with dmg+kb enabled. A relatively small 256 stacker will shoot ~600 tnt every 1 second at the walls (at different timings too, so damage does stack). How are we meant to defend if every 1 second I am smacked in the face by 600 tnt either killing me instantly or flinging me to the other side of the map?