I hear you, and can see why you'd think that. However, I'd argue that these are actually quite different scenarios.
What you are talking about (and what I still don't like) is when a company designs a deck, sells it out, and then decides to do a new version. In most cases, this new version requires no actual work by the designer. They spec a new ink color, and USPC already has all the art. It's done, easy as that. That is a decision to simply extend a deck and drive collectors to want "all the versions" by doing no actual work.
With Aurum, it is quite different. There will still only be 5,000 of them. A very tiny portion will be special, and each one of those special editions required me to do box designs, negotiate for excessively expensive custom papers, go back and forth for weeks on how to actually accomplish things in a way that could be produced, design, test, redesign, test and redesign again. Yes, the cards are the same but these special versions are the "dream" deck. I wanted all of them to have the design of the laser cuts. That was unfortunately impossible, so I got as many of those made as I reasonably could. The mid-level deck has the amazing box stock, but again was very costly so I decided to do the portion I could. The purple deck has all the features but had to scale back to normal stock.
I did not want to give up on the "dream" version, so I made what I could. I think they will be amazing both in rarity and look. My prototype, sitting on the shelf in the sun, is (IMO) a beautiful object. Less a deck of cards and more an intricate small-scale sculpture. And my prototype does not even feature the gold foil, metallic inks and embossing. In a perfect world, there would be 5,000 of those for everyone to enjoy, but I'd have to mortgage my house to create that and it would still cost too much for most people. So, special versions are the result.
I hope that gives a little perspective. With unlimited funds, Aurum would be a different thing. But instead of simply giving up, I thought it best to bring at least a few into existence so a few more people could see the ultimate vision.