Well, let's give a concrete example. I want to use an SaaS as part of my job. My manager knows this and supports it. In the process of me trying to sign up for the SaaS, I have to contact various groups in the company- the cost center folks to get an approval for spending the money to get the SaaS, the security folk to ensure we're not accidentally leaking IP to the outside world, the legal folks to make sure the contract negotiations go smoothly.
Why would the lawyer need to talk to my manager? I'm the person getting the job done, my manager is there to support me and to resolve conflicts in case of escalations. In the meantime, I'm going to explain patiently to the lawyer that the terms they are insisting on aren't necessary (I always listen carefully to what the lawyer says).