I agree with some of what your saying, and see where your coming from. But there's also alot more to this than what your thinking. First off your only 24yrs old, that means you were 14 when you write on how things used to be 10 yrs ago! Big Bucks have always been what alot of hunters seek. I've been hunting 25yrs, 20 of that w/bow. I've never seen gangs of archery hunters. Archery has always been more of a individual sport in the woods. Sure guys will get together, hunt a area, and meet afterwards to tell their tales, share info. But in the woods its a lone sport. So I don't totally agree archery is ruining hunting.
You say you'll never change on harvesting any legal deer. I wouldn't be so sure of that. Alot of hunters go through a series of changes as they get older. Their goals in the woods change with age. You very well may find once you get up there in yrs, and you've harvested many, many younger bucks, and possibly haven't taken that Big Buck you've always truly wanted. Your goals with change to accomplish that. I personally have nothing wrong with a hunter thats wants to hunt strictly for a big buck or the hunter that shoots any legal buck. Its every individuals hunt when there in the woods. So to each his own. So I think its wrong any one hunter should be telling another hunter how to hunt.
Far posted land, and less people allow others to hunt their land. I don't think its strictly because of hunting. Lawsuits, Insurance Co's, have also forced land owners to keep others off to protect themselves from liability. Stealing expensive hunting gear like treestands also comes to mind as a good reason.
Just a few of my thoughts to consider.