[joelgwebber]

Try thinking of it in terms of Android intents/activities. The vast majority of the time, it's handled automatically for you (where "it" is whatever you were trying to do), but when you want the option to choose, it's there.

In some cases (e.g., sharing) it's clear that there's never a single good option -- the choice should probably always exist. There are plenty of others (e.g., image editing) where a site might want to have a specific default, but allow for choice where appropriate.

The alternative, I'm afraid, is what we have now -- you only get the options (usually just one) that an app's developer happened to find time to integrate by hand, usually poorly.