Pbpbpbp...agile fails fast by design.
The counter from the article is you need a specification first, and if you reveal the system wasn't going to work during requirements gathering and architecture, then it didn't count as a failure.
However, in my experience, architects are vastly over priced resources and specifications cost you almost as much as the rest of the project due to it.
TLDR...it's a shit article that confuses fail fast with failure.