Thanks all for the great feedback.
Webster, I got tired of the ups and downs of instinctive aiming. Too many times my excuse for missing a deer was "I didn't pick a spot". It was frustrating that quite literally the only thing I had to do to shoot instinctively, to pick a dang spot, was so easily forgotten. Heck, people write it on their bows... Also low light or further distances, you can't help but shoot at the whole deer. A spot isn't available in those situations.
So I moved to a dedicated aiming system. It became reliable and liberating to know my arrow was going to impact where I wanted. The instant self diagnosis of my missed shots was also a huge benefit that I didn't know was coming. Another benefit that I was unaware of is once I had a solid form and anchor system paired with a solid aiming method, there was no more loss in accuracy if life got in the way and required me to set my bow down for an extended period of time. With shooting instinctive, you would have thought I never shot before after a long lay off. With an aiming system, I can pick the bow up after a few weeks off and it's like I never put it down.
As for a sight, most of my bows didn't have attachment systems for sights at the time, and also I am very very hard on my bows. I wouldn't be able to make a sight last more than a season I bet. In addition, the tip of the arrow is a perfect sight pin, and I've already got one of those. (Most times 6 or more with me

. )
Your questions are warranted, and I'm glad you asked them. Becoming an Aimer was the single best thing I've done for my archery hunting game since picking a bow for the first time.. I'll be honest, I do not miss shooting instinctively. Once you get a couple hundred arrows through your rig while aiming, something happens. The gaps and the thought process behind setting those gaps become very instinctive with no conscious thought. I actually just came in from a practice session with my hunting rig getting ready for turkey hunting Saturday. I was shooting between 5 and 33 yards randomly. Only at distances past 28 yards or so, do I remember thinking where I needed to put my arrow tip. Everything under that, the arrow tip just settled in subconsciously and I executed the shot. It becomes quite natural very quickly.
Shoot straight,
Matt