This is nonsense. First of all I haven't come across an "official" retailer that hasn't accepted Apple Pay. And I've asked about Apple Pay at every store I frequent, multiple times. Some have implemented, some haven't. You can't force retailers to adopt a method of payment, especially if they view it as a negative (in terms of lack of data collection). Many stores haven't even activated their chip readers...is there no demand for that, either?
I simply don't see that many people using it at the "official" retailers. (If anywhere would see a lot of Apple Pay users, it's those places.) With smaller businesses, the vast majority don't even know their new terminals support it because they haven't been trained on it by the companies they get their equipment from. Kinda hard not to come to the conclusion that AP/contactless simply isn't important. YMMV of course.
As for chip, most retailers can't even turn support on until they're certified. And that's been such a disaster as well that Visa got sued.