If you're just shooting to improve your form, which is a good idea, your accuracy is secondary and probably won't be that great.
However, if after you have put in your form practice and are shooting for accuracy, your accuracy is still not up to par, you're probably doing something to throw it off that you're not noticing. There are a great many things that fit into this category, of course. For me, I check my bow hand alignment to make sure I'm not torqueing the bow, my string hand alignment to make sure I'm not torqueing the string, my shoulder alignment to make sure it isn't pointing off to the left of the target at full draw, I make sure my string hand is pulling straight back and not pulling at an angle up or down, and of course that I keep pulling through the shot and am not creeping. But that's just me, because those are the things I don't do correctly on a regular basis that screw up my shot.
All those things that I check are still part of form, of course, but they are things that I know I don't always do right, from experience. You'll have your own checklist, which will probably be different from mine. If I'm doing everything I should be doing, the arrows should be making a nice little group down there somewhere, if not centered on the bulls eye, whether I'm totally focused on aiming or not. In fact, if you'll read Clickerman's series of posts on this forum, you'll get a different perspective as to whether we should be focused on aiming much at all.