@Laika
Not exactly. The main thing with the NBA salary cap is that trades have to be (roughly) equal in current-year salary, irrespective of future year salaries. There are many exceptions to this and it's convoluted, but that's the main driver. Because Norm has a salary that is about 1/2 to 1/3 of a good (ie max contract) player, guys with contracts like Norm are essential when you want to trade for a superstar, because the young guys you have to add (who actually are good and have value) don't have salaries that can make the trade work.
Also paramount in NBA trades is the concept of expiring contracts, because teams want to shed salary at specific times in order to create cap space to chase their target free agents. Teams who are in the middle and rebuilding don't mind taking on a guy like Norm because they can collect extra draft picks along with him for shorter contracts (eg. Redick, Bogdanovic) and then he can align better with when they want to free up salary and/or he can be a salary ballast trade chip when they want to take their swing on a major trade for a superstar (eg. Anthony Davis). There's also the fact that Norm is a viable rotation player with some plausible upside. All of that is to say that he doesn't have tremendous trade value in a vacuum, but his contract size and length makes him a trade chip for teams in specific scenarios.