Your post is quality but lacks one quality. One which I've scanned to see on the list and didn't find it. Maybe, it's there, if not there, I'll add that a quality post is a post with references to the source. And it adds more quality to the first point on your list. References on a particular answer to a question facilitates a better comprehension to the reader by encouraging them to further research about the subject.
Disagree. Adding references would not make difference. If the content was just generalized by a shitposter, adding reference to it would be like putting cherry on top of a poop shake. It would not make it any better.
Referencing external resources is an obvious thing to do when you made your research and came up with a quality content. Not sure where you got the idea from, but I am pretty sure that there are way better methods of "encouraging people to read more about the mentioned subject".