That's the whole point of the article: It's not about "decoration", but about making the underlying UX flow make coherent sense.
Good design isn’t about making things pretty. It’s about making things make sense. Visual design is just one piece of that puzzle.
To reduce a designer’s role to 'making it look nice' is a fundamental misunderstanding of the craft. The shape of the interface reflects the thought behind it—ideally rooted in a deep understanding of the user’s context, goals, and jobs-to-be-done.
Thank you for reading the article!