I believe it is just human nature, to try and "build a better mouse trap"
This has been the success of human evolution for centuries...
Archery has evolved as well, up to and including the compound bow.
In the past few decades, there has been a gaining movement backwards... Back to our roots.
This is a good thing!! As we should always remember where we came from...
Now, I am FAR from what folks would call an "instructor"... But, I have taught many people how to shoot.
I find a bow of mine they can comfortably draw and hold. I help them find a comfortable and consistent anchor point. I encourage most to start shooting 3under for two reasons, 1 it gets the arrow up under their eye, 2 it avoids them pinching the nock and the arrow coming off the shelf.
Then we shoot... A simple paper plate, and short (5-10yds) range.
This is where I explain and work on their release. I explain that you want to relax your string hand, and allow the string to just slip from you fingers. My instructions are simple....
Look at the plate... Draw back to your anchor point.... Look at the plate.... Relax your string hand and let the string slip from your fingers. Suprisingly, "follow through" seems to come naturally when first getting started!!
I think they are so focused on the plate, they forget to do anything else??
After an hour or so of slow, one arrow at a time practice, most usually seem to have it down.
Then, I send them home with the bow, and a few arrows.....
The next time, I put a small "dot" on the paper plate. Same as before only...
Look at the dot... Draw back to your anchor point... Look at the dot... Relax your string hand and let it slip.....
Again, after about an hour, most have all of their arrows in the paper plate.
Practice, Practice, Practice.... FIRST, learn HOW to shoot.
Then you can learn how to be a better shooter...