(a) Company that wants to make as much money as possible from the use of their app. They will use tracker SDKs, sell data directly, sell data through aggregators, etc. And they’ll cooperate with subpoenas (but probably try to charge for it). And they might even cooperate with Texans who want to sue people under their bizarre law.
(b) Apple, which makes money off hardware, iCloud services, and to a limited extent, advertising. They will cooperate with subpoenas, but they also have the legal resources to fight them. And, for something like their customers’ health data, they quite likely will fight.
With choice (a), law enforcement and anyone else who wants to pay gets the data. With choice (b), law enforcement might get the data. I know what I would choose.
Obviously I would prefer (c), the hypothetical version of Apple with stronger iCloud backup encryption.
Side channels aside, this would avoid data leaks.