Why doesn't operator use leader election feature provided by controllermanager?

[glassyya]

Description

We all know that the controllerManager has leaderElection feature and use it is more convinent, why doesn't use the feature but implement leader election yourself?

Importance

(Indicate the importance of this issue to you (blocker, must-have, should-have, nice-to-have))

Location

(Where is the piece of code, package, or document affected by this issue?)

Suggestions for an improvement

Use leaderElection provided by controller manager