They are aiming to make the process completely idiot proof, and good for them. If you’ve ever watched a nontechnical user try to install an application you’ll understand why they had to do all this.
I recently watched One of my friends who has only ever used an iPad and not a laptop try to install an application downloaded from the internet. Things we take for granted like “find your downloads folder” were not obvious. I had to explain what the Finder is, and it seemed laughably not obvious to someone who has never used it before.