Peeps are benifical, and a must for some. however many can shoot as well or better without one once mastered...
I dont use a peep, there were just too many Murphy's law issues for my liking with hunting, the key for shooting without peep is a kisser and two other solid anchor points...I use string close to face and release hand firmly under ear and in jaw...
I have shot two triple hoods without a peep, so saying a peep is more accurate is a missconception and not always the rule...
There are many shooters that have eye dominant issues such as shooting right handed and eyes are "ambidextrous" with near equal "dominant" eye's
or some even with slightly left eye dominace...in both cases eyes will fight for dominace...this is where a peep is most beneficial as it make bow hand eye dominant...
without a peep the shooter's sight line is on right side of string...in between cable and strings...once drawn string and cable cannot or will not be seen, and a wide open view to target is seen
Many make the mistake of trying to sight too close or even thru string where string will cause blurred target issues...
If your having issues with accuracy by all means put in a peep, if accuracy doesnt improve look for other shooting form or tune issues... if accuracy does improve your a peep shooter.
Neil
Neil