Do you not like technology in general, and just favor making more of what we have?
For example. Say 40 years ago someone made a paper airplane. They could keep making paper airplanes forever. Then someone had the foresight to invent a computer. And they were awful clunky beasts that were mocked. It would take you 1000 x longer to program, print, fold a paper airplane on a computer than you could simply fold by hand. So why should people spend thousands (and eventually billions upon billions) of dollars developing computer technologies when we can already build paper airplanes without them?
Because, 10, 20, 30, and 40 years later, they change the world for the better. We can now build technological wonders that are the dreamliners that fly things all over the world. Because while other ppl were thinking they just want to build more of what they had, someone else thought to invest in building technology -- technology that seemed silly, unnecessary, and wasteful to those who did not also have the same foresight.
This technology for Disney is the same. Yes they could have made more rides (and in all seriousness they are putting in rides left and right). But this technology will set them apart from all their competition for many years, who will now play catchup to try to get similar systems to be competitive.
Even tho technology is expensive, I'm glad we have ppl running Disney that embrace it instead of someone who would only put in more rides. I think they're taking a very balanced approach! They are putting in new rides, new lands, opening new theme parks, and renovating others, while also furthering their technology.