A good batch published in the wrong order reads worse than a mediocre batch published well, because the audience sees sequence and you see a spreadsheet.
Sequence is visible to the audience
You see a content calendar. A follower sees a sequence of posts from one account, in order, with nothing else between them. Two similar posts a few days apart is a repetition they notice and you do not, because you were looking at a grid.
So the spacing rules operate on what the posts are about rather than on when they were finished.
The shortfall is the useful output
Running the slot math before scheduling tells you the pool is four posts short of the fortnight, while there is still time to write four posts. Finding out on the day is how a program starts publishing filler.
It does not publish
The grid is produced and handed over. Actually staging the posts is a separate step, and publishing is a person.
Runs well with
Skills compound. These are the ones we usually install alongside it.