Just a little design fault?
Engineers in aviation and marine do in my opinion excellet jobs. They design the equipment to work properly in nearly every condition - fail safe or fail tolerant, depending on the case.
Let's have a look back to the scematic circuit from entry #1936. You see the left and right circuits, for notably important systems they are redundant (activated from left OR right circuit). An activated relais means the aircraft is on ground, The most probable way to fail for a relais is that it cannot be activated which means in this case that the aircraft is in the air. So far perfect...
... with one exeption: the TOWS is extremely important in ground mode - but is deactivated when the correspodend relais R5-2 fails.
Wouldn't it be better/safer to deactivate the TOWS - exactly like the aviation relevant systems - by activating a relais?! Better a warning signal too much than missing one.