I shoot my BW longbow without sights pretty good. A combo of gap shooting and instinctive, I guess. But my BW recurve I shoot with sights, and an elevated rest. It's a great little homemade set-up, and gives a lot of advantage over shooting barebow. I learned good form with a sight, because that pin gave me a solid reference on where the arrow should go. I knew things were going wrong, and started to learn WHY, based on those sight pins.
I wonder how many people who balk at using sights are wounding animals but never tell anyone about it? It isn't exactly "acceptable" to make that kind of post! I say that if you would prefer the confidence that sights can bring to a trad bow, go for it!