Because Anonymous is anonymous, those who obtain this or other forms of leadership influence can be secretly decapitated and replaced by other interests.

This is exactly what happened in the Sabu affair. An
important part of Anonymous ended up being controlled by the FBI. The cooption of its most visible figure, Sabu, was then used to entrap others.

FBI agents or informers have subsequently run entrapment
operations against WikiLeaks presenting as figures from
Anonymous.