Even at the weakest level, EMV adds one important security factor. You can't simply skim a chip card and make a new working chip card.
Without PIN, chip cards won't prevent the card from being individually stolen and used, but that's not where the industrial level losses were occurring. It had reached the point of being a major business for organized crime, and this will put a serious crimp in it. (When I was more involved in bank security a few years ago, you could find franchising skimmer opportunities on YouTube that were renewed every few minutes as they got taken down.)
As well, as one wealthy hold-out to chip, the US was attracting the attention of the world's high tech criminals. Since crime migrates to the weakest link, you don't want to be the slowest deer in the herd, which the US was rapidly becoming. (The US punitive legal system had kept the US from being a favored target when other countries had left their doors unlocked, but once there weren't any other wealthy countries with low hanging fruit, cyber crime was going exponential.
There'll be other forms of crime (crime migrates to different types of crime as well), but few that worked so well on the an industrial scale.