The extension is only used by voice search. If voice search is disabled, the extension isn't used by anything. A mountain is being made out of this molehill.

The extension is only used by voice search. If voice search is disabled, the extension isn't used by anything. A mountain is being made out of this molehill. If the extension was only downloaded at the time that the option was enabled by the user, nobody would care. Instead, they chose to have the extension always available and as a result people are having paranoid over-reactions.