I wouldn't be surprised if that's the primary reason why Disney/Pixar and Dreamworks can so easily make sequels in less time than it took to make the first movie of the franchise (like Shrek, Ice Age, Toy Story etc) Because while it would have taken an incredible amount of effort to make the characters and scenes first time around - they at least can be re-used again later in a totally new format. 2D resources can be re-used too, but for what is often very limited, as you are stuck with what is there, while 3D models can be re-rendered from a totally new angle and lighting situation to what it was used for the first time

Having said that - people who regurgitate the same models/textures over and over for dozens of pieces strike me as being lazy. It's always good to try and create at least some new content for every piece, and use previously-modelled stuff mainly as time-savers (which is critical for anything where time is money, from the big animation studio's to the humble 3D freelancer )

Vue is a very fun program that is surprisingly beginner-friendly for a 3D software as powerful as it is. But it is geared mainly towards landscapes. So you can't exactly build a car or a building or a person etc in it Vue renders with those things in them often have them becaus ethe artist purchased the models from another maker, or they made them themselves in another software and imported them into the Vue scene. Vue's own tools primarily focus on landscape and nature creation, which is good since creating nature in any other 3D software is horribly difficult, so Vue is designed to fill that void But to model actual "stuff" like I mentioned earlier, you often need a generic 3D software (like Maya, Max, Cinema 4D etc) though these can be confusing to learn on your own, maybe search for some tutorials