I agree with this totally. With the global reach of Western civ today, it isn't possible for people to just "opt out" of the system. Just try to roam the countryside living off the land anywhere where other people are, and you'd probably quickly find yourself arrested for trespassing.
Also, I personally wouldn't want to live by myself out in the wilderness permanently (with no others to share in the gathering, hunting, clothes-making, tool-making, etc, I think it would be extremely difficult, not to mention extremely lonely). From what I've heard of the fate of various past communes/"utopias" that have attempted to live apart from society, the dominant culture just will not allow it.
So, in order to become truly, completely, totally wild and free, civ has to be dismantled (not just avoided). This is especially true when considering the entire population, as opposed to just a few people here and there.
Also, I question the ethics of staying focused only on oneself (heading out to the woods to live a personal wild life) while ignoring the destruction that is happening to the natural world (The Wild), all over the globe at an ever-increasing pace, and at a scale that rivals the handful of catastrophic extinction events in Earth's history.
Today, there still exists a natural world that is healthy enough to support our lives (in various places, at least). But it is increasingly unlikely that this land will continue to exist to support our children, or our children's children. I think a fundamental part of the rewilding process needs to be preserving The Wild for not only ourselves, but future generations - and for non-humans as well as humans. This is a crucial question because more of The Wild disappears each day, and this process is only accelerating. >