Why was the saints seen as good boys and the roughnecks seen as bad boys by William Chambliss?

"The Saints and the Roughnecks" was written by the sociologist William J. Chamblis and published in 1973. It is purportedly a description of his time spent studying delinquency in high school students in the very early 1970s. Personally, I think he made the whole story up, as it reads like a completely contrived work of fiction (on par with a heavy-handed after-school TV special that were common in that era). I'm surprised that anyone take this work seriously, but as I was assigned to read it for a sociology class, I had to read this steaming pile of garbage.

It looks like he made quite a career out of this fabrication. Well, all I can say is good for him. Hopefully, he never made up any more stories about the gangs in "Big Town" USA.