The implied answer is that Job wasn't anywhere when God laid the foundations of the Earth. Thus Job had no possibility of knowledge on the level of the angels, much less on the level of God's knowledge.
This would be the point you need to support with some Scripture.
Satan and other angels were there when God laid the foundations of the Earth, agreed. But that does not mean that Job was. In fact, the very passage you quoted precludes it as a possibility.
Huh? Had Job been around (spiritually) when God laid the foundations of the Earth, then He might very well have been rejoicing with them and had some knowledge of it. But the whole point of this passage is that Job was not around and had NO knowledge of it. But the angels were.
This would be the point that you or the Latter Day church needs to support Scripturally, not just state it.
The word is Kosmos, not age. If you want to point out it means Cosmos or Universe, fine. But it in no way shape or form means age or time. Or Latter Day.
Since God predestined us unto adoption as children in Christ (within the world), then what's up with us having been His children prior to the creation? How could we be His children in a previous age, and yet "adopted" children within this age? I'm asking for Scripture on this point, not just a statement or idea of it.
Your idea (we were spiritual children/beings prior) would mean God adopts His own children back, if true. Which makes no sense.
Because it was the chosen purpose of God to be that way.
But you do realize that the text says this occurred at Rebecca's conception, right? Yes it says before they were born but when they were conceived. Which supports my point in this thread.
Rom 9:10-13 (LEB) when Rebecca conceived children by one man, Isaac our father— for although they had not yet been born, or done anything good or evil, in order that the purpose of God according to election might remain, 12 not by works but by the one who calls—it was said to her, “The older will serve the younger,” 13 just as it is written, “Jacob I loved, but Esau I hated.”