Portfolios: iPhone: Noise...who cares?

Small sensors equate to noisy images. Shooting in well-lit conditions is one way to avoid that. But when the light is low and you are presented with an appealing subject, why in the world should you care?
Noise...who cares?

Small sensors equate to noisy images. Shooting in well-lit conditions is one way to avoid that. But when the light is low and you are presented with an appealing subject, why in the world should you care?