Steve - I don't see the small amount of extra effort being described as such a BIG thing? So instead of 2-3 weeks, a person goes 6-8, and for the final weeks one adds some tank water/bacteria from the main tank. So what? I don't get what the big deal is? What Rocksor & Duane laid out is an AWESOME manner in which to teach hobbyists to QT new fish, and from experience some of us can state that it can sometimes prove to be a lifesaver, not just for the new fish, but potentially for the entire fish room. Your only argument is that you haven't experienced this first hand, so it must not be required. Where's the logic in that?
It seems like the term biosecurity is not well understood by some. This is huge in the ornamental fish industry - do a bit of research, you might be surprised at what you learn.