The missing context here is that their company looks to be a very small team - 5 employees according to LinkedIn.

Any process or methodology, or lack of, will work for a small sized company. At that size you get things done by just talking with each other. That doesn't scale to companies with hundreds or thousands of employees where multiple teams that you've never interacted with before may be involved in a project. These "throw out the processes and methodologies" articles are always written by people at small companies. Once they grow, they'll implement the same processes that everyone else uses to solve the problem of becoming too chaotic.