Ziggs Satchel Charge (W). Missing Mechanic.

Dear Riot,

My question is: If Sand blasting with soldiers from Azir does more than etching to a tower, why doesn't a Satchel Charge do damage to turrets? I know Ziggs already does damage to structures with his passive, but it only makes LOGICAL sense for a big bomb designed to damage structures actually does so. This mechanic can be similar to Tristana's explosive but dealing less structural damage and some increased AoE damage to units surrounding the sabotaged turret. Another option would that the charge disables the turret for the time of two turret attacks when W is cast directly on the tower. Food for thought.

Colbosky