I'm guessing they are speed running the prologue? Cause it seems to be progressing fast (I'm not complaining though better then snail pacing it for generic level stuff).
I find it kinda hard to believe that no-one else with "Black" appraisal didn't exhibit an all attribute capability. Although this could be a plot point later along the lines "All attribute people tend to go despot.
Also I always hate in series where a god is like "I'm sending you to a happier place" then proceeds to be born with shitty parents whom abandon/abuse until they get sent to a nice family or meet nice people..... Like in this series why not just birth him to the people he currently lives with as like a miracle birth as the mom looks to be unable to have children?