Both red dots and scopes are both readily available and affordable for vertical bows. So are riser mounted rangefinders...Have you ever hunted whitetail out of a treestand?
Last I checked, vertical bows don't have red dots and scopes on them.
I deal with crossbow hunters almost daily, 3 months a year. I guess 80-90% of them wouldn't be out during archery only seasons, if it weren't for crossbows becoming legal.