Now that OpenAI's technology is integrated all the way across Apple's flagship software and flagship devices, I guarantee you people will blame Apple if OpenAI fumbles privacy even if just on their end.
I've been hearing mixed reactions to Apple choosing OpenAI, because of recent drama and because of Sam Altman specifically. To me, it feels like a "keep your enemies closer" decision on Apple's part because while the company sucks, they do have a competitive (potentially superior) service at the moment.
And Apple has jack without some kind of partnership.
The masses want AI, even if they don't know why. And OpenAI is a big name, even if they make Google look privacy-conscious. The smartest thing for Apple to do is to funnel as many inevitable OpenAI users on their platforms through their own sanitized version of the service.