I quite disagree here. Unless your ships are like spheres with huge thrusters in every direction (in which case i'd agree with the concept of space turrets), the designs we are presented with have the equivalent of small RCS openings sparsely dotted around them. These arent turning a 100+ tons beast on a dime, at all. Actually even ED ships do manoeuver a bit too easily given their weight (and the gamified part is there, achieving a good balance between realism and enjoyable space combat, which is arguably the best part of ED).gamefied" and unrealistic gamey gameplay design like nerfing the yaw in ED ... you don't want to see seemingly instantaneously accelerate and decelerate in space? then again just add unrealistic "heaviness" like ED... but also then again we have gamers hating ED for precisely like that.
Ships in SC are weightless helium balloons. Any interaction between them and anything else whatever the weight shows that clearly.
Avoiding space turrets is the first step towards achieving balance between various ships sizes, and giving some tactical edge to bigger engagements, where careful positioning becomes even more important, and main thruster power (and thus linear speed) becomes a real advantage (build speed, compromise attackers ability to position themselves the way they want, keep them under actual turret fire..).