eXan is right. Automatic mode (in camera or in iPhoto) is for "good enough," while Aperture (and Lightroom) are for better than "good enough."
You can, however, save a set of adjustments in Ap and LR as pre-sets, and apply them to other pictures. So, if you take 25 pictures in the same location, you could save a pre-sets group, and apply them to all 25.
You can, however, save a set of adjustments in Ap and LR as pre-sets, and apply them to other pictures. So, if you take 25 pictures in the same location, you could save a pre-sets group, and apply them to all 25.