That is not correct. Not all those "operations" work as a lay down success hunt. When I got out of TAMU I was blessed to be able and work on a large ranch that had some high fence and some low fence pastures. We actually did a research project to determine animal behavior within a HF. We found that animals within a 500-600 acre high fence were a lot more cognizant,and aware of their surroundings than the deer in the large pastures.
Any small change in that environment, like a gate being opened, a truck driving in, a four wheeler driving or a hunter walking in etc. would cause the animals to all but disappear in the heavy brush for days.
IT depends on how the ranch is managed and how the hunting is done. Lumping all high fence places into one bad barrel is not fair.
I worked on some high fence places that had native whitetails, none ever purchased or pen raised, that we would maybe see during the helicopter counts or spotlight counts but NEVER see during hunting season. One place had a 180 class WT that was found dead that was known to be over 10 years old and was never harvested.
I had a similar opinion as you when I went to work in the WFS field, but the ranches I worked on proved that I had wrong misconceptions about all HF and fair chase.
I am sure there are some bad apples out there like in anything else, but a little research will tell you if they are a "hunting farm" or not. Some, imho, would be more challenging than any low fence place around.,