Sorry, but that’s the facts. There are loads of studies of twins separately adopted, going back at least to the 1930s, showing that it was common practice. The only innovation of this study was to start the study while they were still at the adoption agency. New York, incidentally, didn’t ban splitting twins until 1980.
No, those aren't the facts. Twins were separated because of financial problems among adoptive parents not so that the twins could reach some potential that their twin would not allow them to reach.
There are loads of studies of twins separately adopted, going back at least to the 1930s, showing that it was common practice.
It was a common practice because of financial considerations not because of the nonsense spewed by the idiot in the article or to satisfy the whims of researchers.