Looks like you speak about `The Bus Factor` problem and all the related symptoms to it (Information Island etc..) who is described in the book `Software Engineering at Google` but with another naming? Kind of unconnected island problems in the manager layer here x'D
Hero culture is actually just having good workers. If you can't handle the workload, go work somewhere else. Want more money? Work harder.
@RobertFletcherOBE