I suppose the reason why people say to ignore the supers is because they think the supers will vote with the majority of the pledged delegates.
And frankly, that’s why I think supers are a bad idea. Suppose Bernie does squeak out a narrow win. As much as I like Hillary to be the nominee, I think it wouldn’t be fair to rob him of his win through the supers. And if they don’t, they’re not needed, the pledged delegates are enough.