Comment by spaceheeder

In the next paragraph the author specifies that they were trying to attract a wider cross-section of candidates. The hires wouldn't have been on-boarded if they weren't the best candidates who applied, but there's no way to know if they were the best candidates available when the signals sent by the job postings disincentivize applicants along axes that do correlate to race or gender but not to job performance. That's literally the entire point of the article, as far as I understand it.