Crazy! You could do a much better job than any professional simply because you might bother to take many more pictures until you've got one that you like best. Unless they've got an airtight definition of a "professional photographer", you can probably claim that you, yourself, are a professional.

(The "professional photographers" who take most passport photos are low-paid clerks with what used to be a dual-lens Polaroid camera that made two shots at once. Now, even that's all gone digital. Fuji will sell you a $575 point-and-shoot with a dye-sub printer as an all-in-one solution.)