I find that BS levels are lowest in high growth companies. The ones that make enough money to pay their bills and not take on BS projects, but also not big and slow enough that it rewards politicking and blame. At that stage it's all about making better products and improving user experience without some clueless person with a MBA trying to adopt tiger teams and functional programming.
That is an interesting point of view. What if you choose to be no BS project manager or no BS product manager etc. Unless you mean the BS that comes from dealing day to day with humanity?
I mean in those positions you deal with BS from both directions - upper management and/or the business as well as the personnel under your command.