Not sure what you are replying to, but I think at least parent is saying because people aren't as good as they should be, you put processes in place. I don't think anyone is saying what you stated. Most companies might believe they are hiring the best, but their coworkers are the ones that know otherwise and do things like use design documents to give some structure where needed.

In other words, you take measures to catch errors, mitigate failures, and protect yourself rather than say "go code and push to production everyone, we can just roll back!" That might work as stated in some domains, but not others.