Having one name (at least in common, using hyphenation) is easier for legal reasons too. If you have kids, and one parent doesn’t share a last name with them, you’ll have headaches at school, maybe crossing a border, unless you brought some extra legal documents with, etc.
The report exists, but it has so many errors, misinterpreting its own data to bend to the conclusions its authors decided they wanted to find, lots of cherry picking, and ignoring any fact inconvenient to its conclusions.
Imagine a paper that concludes that dowsing or homeopathy is good science. It’s about that accurate.