Because micro sucks?
Micro isnt some tabooed bad thing for RTS games . Theres various qualities of microing
Good RTS have good quality micro , Shit RTS have shit quality micro. Quantity of micro is dependant on the type of game. Sins is large scale game so quantity should be minimal at best , BUT that minimum must be Good quality. Starcraft has hugh quantity and its also good quality. Vanilla supcom had a hugh quantity but it was shit quality (fabgens micro , Ras micro). You cant eliminate micro from games as people always find stuff to take advantages. Its the devs job to steer the micro gives advantages into good quality rather then shit quality.
In Supcom , people got advantageous if they can put up with the tedious micro of turning on and off FAbricators , and building and building and building , and swapping menus and stuff to build RAS modules every 5 seconds , with more and more exponential sim city building. This is poor quality micro.
Fact is, they're working hard on improving the ability AI so you don't have to micro even that.
I think improving the AI will help , but its not going to eliminate the need for micro. forexample if you have a triple dunov strat , how does the autocast know that you want to reserve the antimatter for healing ONLY other Dunovs? How does it know that your okay with the Dunovs letting shieldless frigates die? How does it know that once 1 of the Dunovs die your might want to use those Dunovs to now heal frigates rather then do a healing circle or just heal dunovs only?