Why is there no korean input method installed by default when korean locale is chosen?

I remembered several years ago trying a Korean install, but I remember you had to hack it to get input to work.

I tried a korean installation of Quantal in virtualbox, and realised that there is still no korean input available on default (or a self-explanitory way to make it available). To get input I had to download and install ibus-hangul.

It seems strange that you can't type in the language that you install.

Fortunately I only use Korean rarely, so I don't mind manually installing it, but I think it should be an included feature. Even if it is just a checkbox in the install (we can download mp3 codecs during the install, shouldn't be too hard for a "do you want to type in your language" option if it can't be included in the standard distribution)