Nate Silver wants us to believe that Trump beat his average poll amounts not just once or twice, but hundreds of times. Citing the average is misleading when you consider the fact that there were many, many polls all wildly incorrect.
Furthermore, it is a matter of absolute fact that these polls oversampled women and minorities, sometimes by 10 or even 15%. All of this was discussed at length at the time on this forum, with the numbers showing Democrats expecting turnout equal to or even better than the Obama years.
Your cheerleading of these polls is silly in light of that.