Its a very overblown/exaggerated idea that is often suggested by hunters. I believe that it has been posted on Rockslide before that there are only 4 areas in the lower 48 where you can get more than 8 miles from a TH/access point. If this is true, I live right next to one such area and I can assure you there are hunters all over the wilderness area. A handful of obvious access points "get you in deep" by forcing you into a canyon trail for 8-10 miles before the terrain opens up. I assure you these trials are full of hunter's broken dreams. Going for a casual hike on these trials during archery season is almost a sport unto itself if you enjoy seeing a trailhead full of "rigs" with hunting stickers and expensive coolers and a trail full of guys decked out in the latest and greatest mopping along after hiking 10 miles one way in to area full of hunters where they have effectively zero chance of seeing any elk and despite all of their effort, turns out 10 miles with a heavy pack is a lot more difficult than they anticipated and they would have been entirely incapable of packing an elk out on their own. But wait, there's more: drop camps are at every single alpine lake.
The more time I spend here, the more exploring and scouting I do, the more comical the efforts of many hunters becomes: The vast majority try the exact same strategies over and over again, year after year in the same exact locations using the same exact THs and trails and ever single year there is a new crop of hunters doing that and they think they are doing doing something that no one else is willing to do because its 8 miles back. I recognize that you can only know what you know and a certain percentage have to fail, but its interesting that so many people think that they are thinking outside of the box when they are literally driving within a 1/4th of a mile of elk to hike 10 miles back where there are no elk at all.