It would certainly be possible to put dots on the riser of the bow to aid in estimating distances, similar to the parallel lines found in some binoculars. While I have shot and hunted with many different traditional archers, I have never known anyone to do that, perhaps because of the ranges we typically hunt, compared with the relatively longer ranges of other weapons.
I limit my hunting shots to 15-25 yards. It is fairly easy to learn to estimate distances within that range, and you really don't have to estimate the distances that accurately within that range to put an arrow in the kill zone, assuming your shooting skills are adequate. For example, I have a 20 yard crawl on my hunting bow, and if I shoot all shots point on from 15-25 yards, the arrows will all land in the kill zone. Now I don't do that, since I know the difference between 15 and 25 yards, so I place my arrow point about 2” higher than the spot I want to hit for a 25 yard shot, and 2” lower for a 15 yard shot.
With instinctive shooting, it is important not to clutter your mind with too many facts, and I would imagine it would do most of the instinctive shooters I know more harm than good to estimate distances at normal trad hunting ranges. Particularly my mentor, Rick Welch, whose motto is “How far is it? Don't know, don't care.”