> whereas it's a bit of an anglo thing to have a "manager" who is somewhat business agnostic
I now see this as a piece of a self-justifying ideology:
https://en.wikipedia.org/wiki/Managerialism
A while back I read an eye-opening book called "Confronting Managerialism: How the Business Elite and Their Schools Threw Our Lives Out of Balance". [1] They see US-style management as a primarily a caste system.
One of the odd things about business in the US is that most people can't even conceive that there are other approaches to business beyond the standard US MBA dogmas. Even when those other approaches clearly are successful, and even when one's ass is getting kicked by somebody using them.
E.g, Amazon, which has been crushing competitors for nearly 20 years by ignoring short-term numbers and focusing on creating long-term customer value. Or Toyota, which went from a nearly-bankrupt company in war-ravaged Japan to the world's dominant car maker using a totally different philosophy of business. Toyota even took one of GM's worst plants as part of a joint venture and made it one of the best ones, but GM couldn't absorb the lessons. This American Life did a very moving piece about that plant. [2]
[1] https://www.amazon.com/Confronting-Managerialism-Business-Ec...
[2] https://www.thisamericanlife.org/radio-archives/episode/561