Wilderness is a place to drop the pretense of civilization, and understand that humanity is not everything. Without the artifacts of civilization it is a lot easier to notice that we are just like all other organisms. Add entrance fees, and we are no longer residents of the natural world. We are paying guests, with the right to be entertained and the expectation of services. Wilderness becomes a purchased commodity.
People are no longer at home, they are tourists separated from their own environment.
I went on to conclude that the planet cannot afford people who are more alienated from nature. My wife forced me to admit I was talking about the concept of wilderness, not any actual wilderness area. The reality is that most wilderness areas are highly managed. Fire has been controlled for years. Trail systems are built and maintained.