No, there is no "if" that can make "necessity/need/needing" non-myth. My desire to make apple pie does not magically create the "necessity" of apples existing or the "necessity" of me finding any apples (whether they exist or, say, somehow ceased to exist). "Necessity" exists only in the imagination.

EDIT: Obviously, the same goes for if I'm dying of cancer within a month and desire a cure or dying of thirst in the middle of the Sahara and desire Mountain Dew.