You know that the vast majority of people have no idea how to locate their music on their computer, much less where their mp3 player's mount point is when they plug it in or even WHERE on that mount point to put the music files. To say you thought doing this was simple means you're much more computer savy than probably 95% of the population.
To me, that's where the brilliance of the iPod/iTunes came it. You put a CD in your computer, waited 10 minutes for it to rip, plugged in your iPod and your music was on your player. At the time, there was NO other music player that came with software that made the experience of actually getting music onto your device so dropdead simple. You had to know how to do 2 things, and that's it...put a CD in your computer, plug your iPod in. That's it.
You and I might prefer to tweak all our encoding settings, curate our music directory structures, decide for ourselves exactly what should be on our devices...but the common, non-technical person doesn't care.