(I know you know a lot, but my only argument is that the last 30 plus years of comics since the rise of the speciality shop is not the same as 1961. Hell, I would even go so far as to assume/guess that news stands in the 60s used to order comics by the box (or by the pound) which would be to "within reason" a random assortment. )
Which has nothing to do with when the the news-stand/speciality shop orders books from their distributor.
There are two different yet over lapping timetables.
How a physical comic is made probably starts even four months further back into the recess of history before the first orders from previews come in to Diamond, or when each shop pays off their account to diamond, or sends back returns, or makes reorders and back orders... Which means that Diamond/Marvel/DC would always have literal tons of comics in warehouses waiting for shipping dates unless something goes horribly wrong.
Using warehouse space costs money, and not using warehouse space wastes money.

Now about Christopher's Youtube link.
I was already smitten with Louise, we talked about Power Pack for half an hour a very long time ago, but no one told me that Ann was drop dead gorgeous. I will amend my files to take account of that.
Although it's odd that they can't see the writing on the wall.
Marvel and DC seem to want a world where they only make & sell comics digitally.
No more physical stores and no more printing/distribution infrastructure.
If they could guarantee the customer base that can fulfil their adjusted profit expectations, this would change how they make money, and bankrupt all our friends that run comic book stores caught flatfooted.
(You didn't watch Halt and Catch Fire?)
Which has nothing to do with when the the news-stand/speciality shop orders books from their distributor.
There are two different yet over lapping timetables.
How a physical comic is made probably starts even four months further back into the recess of history before the first orders from previews come in to Diamond, or when each shop pays off their account to diamond, or sends back returns, or makes reorders and back orders... Which means that Diamond/Marvel/DC would always have literal tons of comics in warehouses waiting for shipping dates unless something goes horribly wrong.
Using warehouse space costs money, and not using warehouse space wastes money.

Now about Christopher's Youtube link.
I was already smitten with Louise, we talked about Power Pack for half an hour a very long time ago, but no one told me that Ann was drop dead gorgeous. I will amend my files to take account of that.
Although it's odd that they can't see the writing on the wall.
Marvel and DC seem to want a world where they only make & sell comics digitally.
No more physical stores and no more printing/distribution infrastructure.
If they could guarantee the customer base that can fulfil their adjusted profit expectations, this would change how they make money, and bankrupt all our friends that run comic book stores caught flatfooted.
(You didn't watch Halt and Catch Fire?)