Agreed. There are a lot of people in tech (and in university CS programs) who like to sneer at the humanities, English majors, liberal arts, and the like. This is basic essay writing that everyone should know.
Could "inverted pyramid" also apply to supplying technical "connective tissue"?
The traditional humanities teach appreciation of their own form of connective tissue, so to speak. Business writing arguably can be learned more quickly and emphasizes getting to the point.
What do you mean by traditional humanities? If you mean literature and skills like scripting out plots for characters and artful language in prose/poetry, then sure, it's not essential to business writing. However, if you're talking about essay writing, persuasive writing, clear language, laying out complex arguments, etc. then it's very, very relevant to business writing. Both categories are part of traditional humanities.
Getting to the point on nuanced issues like strategy or design is actually quite difficult because you have to both understand your point well enough to distill it and you have to be good at putting the words down. I'd argue that the "understanding" part is harder because, from my personal experience, someone who is thinking clearly and just not fluent in English still organizes the writing clearly, but someone who isn't thinking clearly will produce great syntax but the reasoning is hard to follow.
I see much more of the latter than the former in my day to day.
The traditional humanities teach appreciation of their own form of connective tissue, so to speak. Business writing arguably can be learned more quickly and emphasizes getting to the point.