You are making the error of identifying "recipient and bearer of revelation" with "omniscience," which is a false synonymy.
Of all the living creatures we know, humanity alone, created in His image and endowed with free will, has been singled out to be the recipient and bearer of Revelation.
To a higher degree, every Christian is a "recipient and bearer of revelation" by virtue of his Baptism and thus his participation in Jesus' threefold mission as "priest, prophet and king."
To an extraordinary degree the Holy Father is "recipient and bearer of revelation", by virtue of his office as the Successor of Peter, possessing these gifts in a magisterial way as bearer of the Keys and as Chief Shepherd of Christ's flock on earth.
This does not mean we all possess "omniscience," as you so laughable said, nor even "infallibility" in the ecclesial sense.
Once again, it is you who have ironically imputed these qualities to Ban Kai-moon, Jeffrey Sachs and Barack Obama. Ravasi didn't say that. It's you who have done so, turning a commonplace of Christian theology into a farce.
Some advice for all of us: we ought to carefully expound on exactly what is
That would involve real work. But, unlike the ceaseless knee-jerk carping, it would actually be useful.
While papal apologists are busy splitting hairs, they ought to keep in mind that the very fact that his activities supposedly require such complex interpretation and explanation is itself an indictment. Sad when public concern (and yes, disapproval) regarding statements by the Vicar of Christ which can be reasonably construed as un-Catholic is dismissed as "carping". Fr. Linus Clovis and Fr. Ray Blake (among others) are also publicly voicing the same concerns discussed here.