The same applies also to big companies. One thing I always notice is that management wants to sign off on something and then be done with it. They don't want to

The same applies also to big companies. One thing I always notice is that management wants to sign off on something and then be done with it. They don't want to engage with the details and understand them. But all the advice in the doc seems to revolve about constant interaction with the project and deep understanding of what's supposed to be done. the common trend I see in IT departments (and I have heard in governments) that more and more gets outsourced and in-house capability is reduced so they can't really oversee a project in a meaningful manner.