You may not have said "Dickinson" in your post but the one you quoted was very, very specifically talking about Dickinson.
Even for Halttunen and Musty, this holds true. They have absolutely showed "something". Just because they haven't played to your standards doesn't mean that this camp or even a few NHL games are "worthless".
This whole forum right now, not just you, reeks of impatience. If you're going to get irritated at teenagers not being NHL-quality players, maybe you should take another year off. There's going to be some ugly moments. The team is going to really f***ing bad. Smith is going to struggle, Celebrini is going to go through rough patches, even Eklund is going to have some bad stretches. It's called "development". I know everyone wants high picks to immediately be superstars but that's just not how it works.