DOES FORM FOLLOW FUNCTION?

Consider the two following quotes. The first one comes from the objective technical world, the second one from a literary fairy tale:

Form follows function.
Louis Sullivan, architect.

"As he is no longer beautiful he is no longer useful," said the Art Professor at the University.
Oscar Wilde, story writer.

I do sympathize with Wilde and the "form" view rather than rational Sullivan, partly because of my aesthetic sensitivity and creativity, partially because I am at a university myself!
And you, reader? Do you consider form or function of your creations the most relevant?