[hhandoko]

You're making the assumption that other teams and other leaders won't review your docs. In my experience, they do and always come back with more questions.

> If you do suspect ...

And that's exactly it. If I suspect something then of course I can communicate it directly or redesign, but we're trying to assess impact on areas I might not have no awareness of.

So let's put it in another way:

Design docs is one of many formal methods of communication in any organisation. It preserves context, change history, and a good part of risk management. It protects you and potentially saves downstream rework.