1)I have read tons of reviews. All of them say that the graphics in Skyrim are incredible.
2) The more content the more graphics needed
So, yeah, content and Graphics are connected.
Yeah, and I also go by standards and reviewers that actually compare that standards. But mostly on my own opinion.
They are connected with everything else in that concern. If you wanna compare graphics with level design or such in terms of work-layout, then you also have to compare it with sound, lore, spell-making, combat, etc etc. Basically everything else. How good is that, would you say?
Also, keep in mind that work-layouts can always be changed depending on the situation. They're not static.