I think a shift in perspective would make the image a bit clearer. I don't believe it's a numbers thing so much as a quality thing. I don't think the harvest stats with archery gear is much of a factor... however, with the large amount of people hitting public ground and the insane amount of easily accessed land. It forces mature bucks onto private in a very short order. It's not like this is a mountain state or even like some other prairie states that have alot of land that is far and wide without roads. Go ahead and find a spot in western ND that you can get 2 miles from a road, trail, or leased oil road, it's not possible. I've bowhunted the badlands for 17 years and the drop in trophy quality is staggering. Again, I think it's a perfect storm of unlimited resident archery tags, combined with an abundance of NR "any" tags that are treated as mule deer tags, pushing deer to private grounds, and a rifle season centered over the rut of November. That combined with the fact that nearly any landowner can get gratis tags and will use "ranching" as a means of driving both public land and his own land to fill his gratis tag. (Which is only supposed to be used on his land). These are not assumptions or guessing either. This is firsthand knowledge and having met many farmers and ranchers that simply don't care what the law says and openly admit to it.
Side note. Trophy quality is diminished to some extent from NR who get frustrated and shoot a 2 point buck in the badlands with a bow. (Not hard at all to do)
The current state of an area that I hunt and hold near and dear to my heart is very frustrating and very sad. It's not what it was 5 years ago. I'm sure the same can be said for many of you in western states as well and I empathize with you.