The fact of the matter is that theyre both good and and theyre both stars. Theyre different players, Id take Cam, shrug whatever.
There are many factors, supporting cast included, which make it difficult to isolate and statistically quantify individual qb performance. 538 is a statistics site, originally for politics then baseball, so this is what he's saying.
Nate silver is literally one of the smartest sports and stat minds in the world. His political predictions are almost perfect, and he's made some jaw dropping sports predictions, famously predicting a Tampa bay rays World Series run before the season started.
Calling him stupid makes you look like the drooling simian you are.