That's what creative agency do. Create storytelling and meaning of what and why they do something the hard way. It's why there is still some company (e.g. Colossal Media) that hand-paint advertising on the building wall and not just easily print it on vinyl. It gives meaning to their creation - also differentiate them from the others.

In practical sense, yes, you can do it really fast, easy and cheap with any 3D software nowadays in just 2 days(but where's the fun in that?:) IMO, easily created things are also easily forgettable.

Another example is Apple and some of their recent desktop/iPhone wallpaper. It seems like CG, but those are real piece of art, made by hand, and photographed. Google's Material design concept, with real light and shadow, comes to mind too. Seems overkill?, yes, but it did has story behind it and not cheaply made in 2 hours with Adobe illustrator. The nonsense, abstract and intangibility part of it is what differentiate the brand. You will never see utilitarian brand like Amazon do something like this.