Dimitri Fontaine shares 3 classic data-modeling anti-patterns. The UUID section lacks strong argumentation, but the real gem in this article is his advice at the end. A snippet:

My advice is to always normalize your database model first, and then only fix the problems you have with that when you actually have them. Well except in those 3% of cases where really, really, it should be done in the design phase of the project. It’s quite hard to recognize those 3% though, and that ability is hard gained with experience.

Experience is the ultimate teacher.