Why is it only possible to choose between four alarm sounds, one beeing "nothing"?

A "moooh" or a "cow bell" isn't really appropriate in some settings - and the "standard sound" sucks (sorry my french).

(And, trying not to be rude, isn't it kind of apple'ish to be that kind of proprietary about a user-interface-thing like that? it's even fewer than the used-to-be six SMS tones)

Pls, make it possible to choose (at least between a few more) alarm sounds!