So according to JW thinking the following identity is not used becuase it gives the wrong impression:
"leaders" = "those who take the lead"
Although they admit there is nothing wrong grammatically with identifying "leaders" with the phrase "those taking the lead", the word "leaders" implies following men, which the JWs like to pretend they are not doing.
According to the JW mindset, the word "managers" is substituted for the word "leaders" or for "those taking the lead."
The elders in the congregations are "Watchtower Managers" taking direction from the FDS (according to the Organizational Chart).
In the past, elders were even called "Overseers"(*), but the use of that word within the congregation was stopped several years ago.
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(*) overseer - a person who directs and manages an organization