What we have here is a failure to communicate.
Some are reading your question, and thinking, "This is pretty straightforward – here's the link."
You are reading those sources and thinking, "But that doesn't answer my question!"
So, there's an apparent disconnect between what you are asking, and what some observers think you are asking.
I think maybe some of this could have been avoided had you done some of that basic research before you asked your question (maybe you did), and then included those findings in the body of your question (which is where the problem may be).
Had you provided a more detailed overview of the basics, and then explained why those hadn't satisfactorily answered your question, then it might have been easier for everyone to see the depth you were aiming at, and that might have warded off some of the close votes (though one never knows for sure, this can be a fickle community at times).
That said, I have observed an apparent correlation between the amount of detailed background knowledge put into a question, and a hesitancy for readers to click on the close button.