CC, Nit picking is trait generally seen in those who like to confuse simple issues by looking to the irrelevant while ignoring the actual issue.
Call them two different concepts....which they might be.....but the common link is one entity can carry out the dual function under a single line of command.
The end goal of both is to ensure Safety.
I seem to see folks arguing about structure....and ignoring reality.
Reality demands actual performance and meeting of requirements and goals.
The simpler the system, with the least bureaucracy possible, is the most efficient....and that is what I am talking about.....not cutting standards but ensuring standards are maintained at the least possible cost.
I can assure you my standards of safety usually exceeded most of the Operator's I worked for....and explains how I managed to make it through a flying career without any Accidents or Incidents to my account.