I got the book from Amazon, flipped through it. I think some of us tend to get cynical about outsiders, because there is a good chance they will start complaining about how Austin/Texas/the US suck compared to back home.
As for boondocking, the problem that the US has a raging drug epidemic (meth, etc.) This results in any public space that isn't policed 24/7/365 being turned into either a place of sale, a place of use, or a trap for the unwary. This is why hundreds of rest stops and picnic areas in Texas have been closed. Other countries don't have this problem. This is also why if one wants to dry camp, it usually is done on private property in the eastern portion of the country, while the western section is blessed with BLM dispersed camping. Before the epidemic in the 1980s, rest stops and other places were relatively peaceful and safe. Most other countries don't have this problem, so they allow people more rights in public spaces in general.