We don't need it.
The reason the rest of the world has to deal with PINs on credit cards is because when retailers there use chip and PIN, all liability for fraud is put on the customer. That's not possible here, it's the one area where we have far better consumer protection laws than the rest of the world. Fraud liability here is ALWAYS on the bank.
And chip and PIN doesn't eliminate fraud at all. It just means that cloning a card also means having to get the PIN, which isn't at all hard to do. You just integrate a camera into your gas pump card skimmer.
So yes, the US shuns chip and PIN, and that's a really good thing. We don't have to deal with the annoyance, and we don't have to care about fraud.