If you were convinced you had a big lead, you would not do appearances, either.
When Dukakis was trailing badly after the final debate, he announced that there were too many questions left unanswered and there needed to be another debate.
Bush Sr said no.
I am sure Dukaksis was still on the campaign trail.
Now, Hillary could be believing the MSM polls which have her ahead, and this could be a Dewey-Truman situation, where Dewey got out campaigned by Truman in the last week and lost the election.