It probably comes from how much of his early stuff was short fiction
Rule One: You Must Write
Rule Two: Finish What Your Start
Rule Three: You Must Refrain From Rewriting, Except to Editorial Order
Rule Four: You Must Put Your Story on the Market
Rule Five: You Must Keep it on the Market until it has Sold
I still love all of these books. I still enjoy them!
But at the same time, each of those little pieces of the plot? they're okay. not great, but okay.
So I think that's why I still enjoy these books. On the small scale, close up, they're fun.
his approach to writing was very much You Sit Down and you Write The Thing and you tell your agent Publish This Thing and if they come back "The Editor says Fix X" then you Fix X, otherwise you Move On To The Next Thing.
<Heinlein> I'm sorry, I can't hear you over my 11 Hugos, 32 novels, and 59 short stories.
<Heinlein> Oh yeah, I forgot to mention: They had to give me seven of those Hugos retroactively because they were for works that I made BEFORE THEY INVENTED THE HUGO
They're terrible, yes, but only in the bigger picture. They're the sci-fi literature equivalent of the "popcorn flick"