I guess my thinking is shaped by my introduction to tech writing, which is when I was working on Computer Based Training (back even before online training was a thing), and we had to build stand-alone courses that could teach students what they needed to learn without an instructor. First, we tried having the instructors write the storyboards. This was not successful--we got stacks of hand-written notes with "click on the widget" and no indication of what should happen after the click. So we sat down with the SMEs and wrote the storyboards with them. It was like pulling teeth, because they were used to teaching in an environment where the students would pull the missing details out of them by asking questions. They simply weren't equipped to provide 100% of the information a naiive learner would need to understand the topic.

Our writing standards were a Godsend, because they gave me an objective reason to keep asking "stupid questions" to provide the information students needed to be successful. And they were doing things that could get people killed if not done correctly (not web development).