docs(angular): 📝 refine eXtreme Programming description

Author: yjaaidi

apps/cookbook/docs/angular/02-glossary.md

@@ -31,7 +31,8 @@ Dogfooding is the practice of using your own product or service internally befor
 
 XP is a software development methodology that hasn't sold its soul to the devil of certification-driven business models.
 
-More seriously, XP is a lightweight software development methodology introduced by Kent Beck in the late 1990s. It is meant to improve software quality and responsiveness to changing requirements. Instead of trying to predict the future, XP embraces change, hence the subtitle of Kent Beck's book [eXtreme Programming Explained: Embrace Change](https://www.amazon.com/Extreme-Programming-Explained-Embrace-Change/dp/0321278658/).
+More seriously, XP is a lightweight software development methodology introduced by Kent Beck in the late 1990s. It helps teams switch their apprehensions from "what if we missed something in the requirements or our understanding of the problem?" to "what if we waste hours or days on something that does not provide any value to the user?"
+In other words, instead of trying to predict the future, XP embraces change, hence the subtitle of Kent Beck's book [eXtreme Programming Explained: Embrace Change](https://www.amazon.com/Extreme-Programming-Explained-Embrace-Change/dp/0321278658/).
 
 XP is based on the following set of values: Communication, Simplicity, Feedback, and Courage.
 These values are distilled into concrete principles like: Rapid Feedback, Assume Simplicity, Incremental Change, Embrace Change, and Quality Work.