> What is the value in anonymizing your voluntary engagement within a single corporate entity?
Because up to a certain point it isn't voluntary
> Why for example would I want to make it any more difficult for my doctor at a hospital and the hospital pharmacy to share my confidential health information to ensure I get the right treatment?
Because principle of least privilege. This is one example, another could be the doctor sharing health data with an internal hospital logging service, which is utilizing some cloud service, which is utilizing some other cloud service, etc
Because up to a certain point it isn't voluntary
> Why for example would I want to make it any more difficult for my doctor at a hospital and the hospital pharmacy to share my confidential health information to ensure I get the right treatment?
Because principle of least privilege. This is one example, another could be the doctor sharing health data with an internal hospital logging service, which is utilizing some cloud service, which is utilizing some other cloud service, etc