Mistakes Google makes:
https://www.industrialempathy.com/posts/design-docs-at-google/
"One of the key elements of Google's software engineering culture is the use of defining software designs through design docs. These are relatively informal documents that the primary author or authors of a software system or application create before they embark on the coding project."

"informal" and then the use of "embark" for implementation show a very code-centric culture. This is the crux of the mistake. They are not unique in this.