I would guess it's because Apple are a hardware vendor that at least talks about privacy as a selling point.
The M series chips provide large amounts of GPU RAM so I think people can see a world where Apple sells local first, privacy focused, inference based on hardware sales.
LM Studio's strategy seems to fit that very well.
I would respect Apple's privacy talk if they facilitated running Linux. But it takes years of reverse engineering to get it barely useful on a Mac.
So they put revenue above true privacy, as companies do. But they are the loudest to spit the bs while selling black boxes.