Kmac, Mac here! I think you need to sit back and have another bottle of Vodka!
I have hunted in fenced ranches, and I hve hunted in Alaska where the land is open for 1500 miles, without a road, or fence. I've hunted on Islands that were smaller than most ranches in Texas, and Denmark is smaller than Presidio, and Brewster counties of far West Texas, and that's only two of the 252 counties in Texas's 257,000 sq miles, 95% privately owned . None of these places ever produced an animal that was what any thinking man would consider "CAGED"!
I was born on a Brush country Texas cattle ranch, and there are places of no larger than 600 acres, on that ranch where an Elephant could illude you for a week of hard hunting. I've hunted Kodiak Island, which is smaller than my grand father's ranch, and the high current cold water that surrounds Kodiak is in effect a fence. I didn't find the animals there to be "CAGED".
I know you think you know what you are talking about, but you are sadly mistaken in this case. Most of the ranches in Texas start in the 16,000 acre and above in outside land area. That outside measurement doesn't tell how large the ranch is, in surface area, only what the border says. I can take you to one of the smallest High fence areas I know of, about 1000 acres behind fence. This place is hilly, with creek bottoms, rocks, and bluffs, covered in Yopon Holly so thick you can't see once inside it. This 1000 acres, if flattened out, would be 5000 acres, and you still couldn't see more than 100 yds in a few places, and near 10 yds in most of it. This place has a lot of exotic game animals in it, as does all of that part of Texas, fenced or not! I think you would come away with as different opinion, if you had to find a trophy 1000 pound Eland in that 1000 acres. I can guarintee you will be humbled by these masters of eversion, and if you have half your clothing still on you when you get through one day of HUNTING behind that fence, you'll be lucky. To top this off you will be lucky if you get a trophy Eland there, and there are pleanty of them to be had if you know how to HUNT!