Didn’t have time to check it out myself yet but considering there’s still no public release date it’s most likely case of “things change too much to focus on teaching” or simply forgetting (spending days on a project can blur the line between what is and isn’t obvious). Not trying to dismiss your complaint obviously - one should expect people to need some guidance.
It might be worth letting the devs know - the more people mention it the more likely they’ll realize it’s a problem.