If you use a die which has some sort of expansion (mandrel, ball etc) then there isnt really much reason to turn for the "tactical" shooter. Provided that your loaded cases fit. If you have a tight neck chamber and need to turn to chamber the round then thats different but I wouldnt say that would be common in the tactical shooting environment where they want things a hair looser for reliability.
For bench and absolute accuracy then yeah, turn necks. But if you arent measuring your group sizes with a caliper on paper then dont bother.
Im not sure if annealing really helps me or not, I had shot good groups consistently for a long time with good brass life before I got my annealer. But my annie runs through them quickly so its just another step Ive thrown in because it cant hurt, only help.