Well, I like to assume that these drones are a means to making piracy and mining more viable... Unfortunately the issue with piracy is simply the value of goods. I've only tried a bit against NPCs, and I honestly think it's fun as-is, trying to get a limpet or two off then quickly scoop up as much as you can before the police arrive. The goods just aren't.. Worth that much at all. At the end of the day, I decided piracy wasn't really for me and went back to bounty hunting, but with that said, I could see how people see drones as a "tax" on an already low profit profession.
With mining there's a similar problem in that the value of most refined ores just isn't that high at all. Though it hasn't even been confirmed that these drones will function with mining, I almost hope that they add some sort of separate drone for picking up ores and then set the prices between the cargo drone and mining drone accordingly. Would add a little bit more depth as well.