I wouldn't say they're simple steps, and Crouton suffers from trying to run both operating systems at once, which can only be done by heavily patching the "guest" operating system, which in turn means only supported revisions of specific distributions are supported - and the only in some configurations. Want to run Cinnamon? Don't even try.
(There's also very little reason to suppose this provides any real benefits to users either. Why would you want ChromeOS if you're already running Ubuntu? ChromeOS is bare bones GNU/Linux with Chrome as the UI, and Chrome runs fine under Ubuntu.)
Crouton exists mostly because it's awkward to install a "real" Ubuntu instance on a Chromebook, and so the authors figured that maybe getting bits to Ubuntu to work under the already running ChromeOS kernel might be "good enough". It's an illustration of the problems with Chromebooks, not indicative that Google has some kind of solution to "Linux on the desktop".
I'm not saying Chromebooks are bad, or even that you shouldn't buy one to run Ubuntu/etc (but use chrx, and be aware that the experience of installation is suboptimal, requiring BIOS patches and barely documented control key combinations at boot) - they can run more open distributions of GNU/Linux, and if you like the hardware, then go for it. But this "Crouton proves its awesome" stuff is overblown. Crouton is a smart, interesting, hack to workaround a problem, but it's probably not going to deliver what the average "I want to run Fedora/Ubuntu/Mint/Debian/CentOS" Slashdot GNU/Linux user wants.