The analogy I would draw is to the relationship between ideals of code beauty and design patterns. Design patterns aren't the goal, they're particular ways of achieving an ideal that people have discovered work well under certain circumstances.
Likewise, the practices aren't the goal, they're implementation details. I can't even understand how to say a practice is wrong, the things I judge are the degree of communication, the amount of discovery, the flexibility to pivot, and so on. Practices are how but not what.
p.s Get off my lawn!
http://weblog.raganwald.com/2007/10/three-blog-posts-id-love...