Ok, so I trust Apple about privacy, but back when I tried self publishing on the App Store I kept every copy of the developer agreement because running diff was the only practical way to know about half the changes they made, and for which I was only given a Hobson's choice to accept or stop using the store.

I don't trust them to stay good forever.

I definitely don't trust them to not get infiltrated by government agents who want the sensor data. I only mostly trust their digital security enough for Apple Pay and Keychain.

I recognise none of this is evidence against Apple as it is today, and that my concerns speak of hypotheticals. But then, I don't think of anyone at Apple as Big Brother; the closest is that I find their content rules to be that frustrating Anglosphere dichotomy which treats sexuality as vastly worse than violence.