Apple colluded with Google when it suited them before, I cannot see a reason to trust them any more than Google.
If a large corporation officially advertises to enterprise customers a bounded, testable claim (e.g. traffic to these IP addresses is limited to notifications), then that claim can be subject to ongoing audit by the IT teams of multiple, independent, enterprises.
Verified accountability is far superior to trust. Step 1: vendor corporation makes a bounded, testable, claim.