IMHO the business environment is still worthy of anthropological study.

Absolutely. My point was it has been studied, by anthropologists, for years, but our field has great hubris of inventing everything for ourselves (this hubris has some advantages of course, but when it comes to reusing existing knowledge it's a big disadvantage).

A minute of of google searches would reveal papers and books about the anthropology of work, including office work and even studies specific to modern tech work. There are even classics in the field, such as The Psychology of Computer Programming, by Weinberg, which despite the title, has many elements of anthropology in it - a book published in 1971.

Oh certainly, but it's an environment that exists within a culture, albeit one that increasingly abdicates to nebulous "business" rather than people.

I'd argue that a business exists within many cultures. I agree with your second assertion. Within those two there is a clue why "business culture" is a baseless idea.