Yes, and you want to add 1 drone per level, which is 10 Medium drones or 100mbits of bandwidth. The whole point of the Proteus is that it has to mix guns and drones to get the most out of the hull as opposed to the Vexor, VNI, Ishtar, and Domi which are more “pure drone boats” in where their bonuses and slot layout sit.
Letting the Proteus field 10 Mediums would bump its drone DPS up to the same level as the Isthar but with Medium Drone tracking and speed, which would be utterly ridiculous. Plus it still gets 7.5 effective turrets on top of that.
Your options for a Medium Drone boat are either anemic DPS compared to other Cruiser and BC sized drone boats or the Drone equivalent of RLMLs on steroids, since Medium drones have fantastic application for a medium weapon system. That’s why the closest thing we have to a dedicated Medium Drone boat is the Gila and it still gets half its DPS from launchers.