I suspect you don't know this, but: the Watch provides tactile "nudges" about turns one way or the other. For more complete directions -- and, obviously, a map -- you still have your phone, which is orchestrating the navigational prompts on your wrist.

It's useful, when navigating, to be free of the need to stare at one's phone or a map the whole time. That's the boon here.

But, again, I note you're the guy who seems really invested in hating the watch -- even to the point of dismissing as invalid reasons another poster enjoys it! -- so it's not clear why I'm replying.