Ok, you’re in middle-management; you’re a capable, ambitious person.
You have to interview some people for a position subordinate to your own.
There are several candidates available who will be more than adequate to the task, but one of them is outstanding - not only will he/she be capable of the job, but is certain to excel at it.
You recognise the reality that this person is quite likely to get promoted over your head, possibly then preventing your own progress in the company.
Do you employ the brilliant candidate who is a danger to your career, or do you employ one of the safe, but merely adequate alternatives?