Is Nate Silver "concerned that during future elections, the accuracy of your predictions will lull readers into a mindset of 'it has been foretold, therefore I needn’t bother to vote'"?

Yes, "a bit."

Did Nate Silver "enjoy getting the ire of pundits (not the few who actually critiqued your method, models, or assumptions, but those who just dismissed your work wholesale)"?

At some point in the last few weeks of the election, I guess I decided to lean into the upside outcome a little bit in terms of pushing back at the pundits in my public appearances — as opposed to emphasizing the uncertainty in the model, as I had for most of the year....

Stupid poker analogy: part of playing well is in maximizing the amount of value you get from a hand in the event that things go well, in addition to mitigating your losses if they don't.