Not that many people are questioning it. The survey that the bbc article referenced showed that 94% saw nothing wrong with the photo. I doubt you could get that many people to agree that the sky was blue and grass green. So all in all no one is outraged.
It’s probably just a case of people trying to find some content that they can manufacture a storm about in the hope that it draws traffic to their little bit of the web. And that isn’t intended to be aimed at the photographer although it will have worked out very well for her.
Personally I wouldn’t share it, but given the nature of the photograph the people best placed to make the decision are the photographer and her husband. If they’re happy to share then I don’t see a problem with releasing it.