[idiotsecant]

Most drones aren't optical because optical drones sacrifice payload and distance, they're only used when broad spectrum jamming is expected. Jamming of that type is expensive and heavy enough that infantry probably won't be jamming, or light vehicles, or a lot of infrastructure.

[creaturemachine]

Most light vehicles are jamming, and infantry at least have detection capability, which is why fibre is now the standard for close range.