Going strictly youth is how teams like Charlotte become bad forever, or Detroit ends up losing 25? straight. NBA salaries are high, sure it's a lot of money but Poeltl can be moved, and the other contracts aren't forever. I think the base is good, they are having a tank season while playing youth... and some tradeable assets on the roster, control of their own pick. Really kind of a best case scenario unless people expected a playoff team. If the draft picks going forward fail, then the team is in a bad spot but that's true for any NBA rebuild unless you can attract stars to your city, by them forcing their way to you.
They won a championship and get some extra run way after trying to run in back with the beat up corpses of the championship roster. There is no clear path to quick success in the current NBA landscape so it's slow and steady. Not the best comparison since Shanahan has won nothing and is still employed.