It isn't obvious to me that the age of consent should be identical in all contexts, so this doesn't seem alarming on its face. It depends on the particulars. That's where a good anecdote can help, but this one doesn't. I don't need to be convinced that consent is always necessary for a valid marriage.
No doubt! The rest of the article provides other statistics and apparently there's a report they're getting this from. Sibling comments have also already begun to provide more context. The internet is truly an amazing place, but especially HN here. I appreciate the effort that goes into everyone's commentary!
Edit: The comment this is responding to has been edited so context has been lost, but I'm letting this one stand as is.