I wonder if the bride has bothered to think ahead, say about 8 years ahead, to the moment when her daughter, flipping through the pages of family photos, comes across her parents' wedding picture, showing a very pregnant bride. Since daughters conceived out of wedlock tend to also get pregnant out of wedlock, the mother may not be so eager for her daughter to know all the details. These bulging brides are making a very large mistake.
I think its an lame effort for validation.
By going for the absurd notion that a pregnant bride should emphasise her pregnancy, she is attempting to hide her mistake in plain site. It is not unlike the old fairy tale of the emperors new clothes, the emperor realizes his mistake but finishes the parade anyways. A different lesson granted, but same concept.
I think you are 100% correct about photo albums in the future. You can not hide behind your finger.