[TheDon]

Reason why, to rule out human subjectivity and make sure the decision was divinely approved, hence "chance" to us, but controlled by God

By revelation then?

[rollo tomasi]

Yes, the lots, (A method the current twelve used) was a divine revelation to them. Certainly not the way a Pope is chosen now.

While the eleven casted lots Jesus acted on His own and hand picked Saul/Paul. This added even more questions about the “line”.