I have the V6 and got new tires. They said my car did not have the bad tires, but they replaced those anyway. They agreed to before I purchased so they were more motivated to make sure they would sell the car.
They were wrong or BS'ing you.
The TSB says all 2015 Hankook equipped cars can be replaced at the customers request. Why anyone would do that before driving on the Hankook's is beyond me - with so many not having issues with the Hankook's, it is throwing away a free set of tires when you want them over the next 3 years.