But it may not be necessary, as the main idea behind and desktop Linux distribution is to install it, not customize it anyway you want--that kind of goes against that vaunted new user (? maybe ex-windows) demographic
True, you have a good point. But, every time a new version comes out there are always many questions/problems installing, from almost new users already using Mint who want to take advantage of the new release.
I strongly suspect that many of these problems are actually bad burn problems. Even more experienced users would appreciate an easy way to install directly from an iso image on the hard drive, as opposed to burning a cd/dvd every time. Also, there are more and more sub-notebooks of various kinds that don't have a cd/dvd drive that would benefit greatly from the "fromiso" cheat code being available.
I just upgraded to the latest version of sidux, as it has been about a year since I did a clean install on that box. Using "fromiso" it took 1 min. and 7 seconds to do a complete install! It doesn't get much faster than that.