Because people are too lazy, or too busy, to learn how to code, and those in this community who DO know how to develop have better things to do.

*Sigh* My offer to throw large amounts of money (well, probably under a hundred dollars, and I hope others would contribute, but still, I wouldn't mind at this point) to anyone who knows Hildon well enough to pickup the system-wide portrait keyboard - http://talk.maemo.org/showthread.php?t=55371 - and finish it to a workable state with both QWERTY and T9-like input (not necessarily predictive or error correcting, just reasonably usable) still stands.