When I was 12 or 13, my step-dad introduced me to archery. I shot no sights (bare-bow recurve)off a flipper rest with plastic vanes and aluminum arrows, gap shooting.
That's how he shot field archery, so that's how I learned. He did teach me however how to use crude adjustable sights for hunting with cedar arrows. Compound bows were just getting popular then.
Flash forward to today, I'm using a longbow with no sights, both eyes on the target and shooting better than ever. Maybe it's because I'm 51 years old, but I can't do two things at once...I need things to be simple. A simple stick and string, focus on my target and I'm fine.