Thanks, Alpha, I've just checked on this system.
My point was that the very same automatic missile-crushing self-defence system which gives a unit an EW rating and the ability to fend off ATGMs is also able (in the same package, without any modification) to repel, in some expent, infantry assaults.
The NVW in itself or the Leclerc's "Frag-GALIX" are stand-alone anti-infantry systems which can therefore be pictured as weapons. On the other hand, if you have to add such a weapon to each ARENA-equipped tank and AFV, you'll end up having to make drastic choices, particluarly with Russian missile-firing tanks and BMP-3s.
This being why I thought that an additional defence against assaulting infantry could be added along these systems (EW rating, once again) without too much worries (well, the amount of worry is Andy's decision I guess
).