Any serious organization will take that into account for the managers own performance. Their job is people management, and so losing an employee is potentially a strike against them and they need to be able to justify the firing was not their own failure but the employees inability to perform, which is part of the process. You can also get some signal about this on how other employees are performing, if every employee’s under performing then obviously it’s a cultural management organization issue, but no organization can be all things to all people often there will just be bad fits and people need to be able to move on.

Ah, well, I guess in that case most organizations are quite unserious.