You could ask why not. Why shouldn't people develop different formats, for whatever reason?
Rather I ask "why did they come around?", and the question "what particular feature is (/was originally) this format's raison d'être?" is part of it.
Developers overestimate the novelty of their ideas.
The Fool is the spirit in search of experience. He represents the mystical cleverness bereft of reason within us, the childlike ability to tune into the inner workings of the world. The sun shining behind him represents the divine nature of the Fool's wisdom and exuberance, holy madness or 'crazy wisdom'.Although it cannot be seen in all modern cards, The Fool is often shown walking off a cliff. This raises the question "Is The Fool making a mistake, or is The Fool making a leap of faith?"
I think ALAC would instantly crush FLAC overnight, if Apple starting selling from iTunes in ALAC format. Why they don't is (I assume) either weak consumer demand or a refusal by music labels to come onboard (at a workable price point).
I didn't verify it, but I've heard that Apple sells M4As with ALAC endoced audio.