Were the new hires more successful or were the hiring managers more successful? Note the hiring managers are the ones picking the criteria. My guess is a dev

Were the new hires more successful or were the hiring managers more successful? Note the hiring managers are the ones picking the criteria. My guess is a dev who passes leetcode but fails to produce is not seen as reflecting upon the hiring manager. It doesn't matter if leetcode correlates or even negatively correlates with the success of the new hire; what would matter is not being able to blame the hiring mgr.