(a) There is pressure from many governments to give backdoor for surveillance. Or just comply with subpoenas that are against human rights.
(b) Complying with local laws generates PR damage. It makes privacy and ethics as a brand strategy look disingenuous.
The solution is, of course, to generate truly secure system where Apple can't make backdoors. Those services may not be available in some countries, but then it's just missing service, not a compromised system.
This is something Apple is increasingly working on. For example, in Fall 2020 they actually revised their CPU designs (including older CPUs) with a new Secure Enclave design that uses mailboxes to more securely store the number authentication attempts inside the secure enclave.
The goal of this is to make it so that even if the FBI had an incident similar to 2016, Apple would not be able to fulfill their request to make a backdoor, and the FBI wouldn't be able to make a backdoor even if they had the power to sign and run any code they wanted on the phone.
That's how you make a secure system these days. You can't just make it secure to everyone but yourself and fight the government - you need to secure it from yourself as well.
That only works if you don't give control of the servers over to a third party and also use encryption on the servers. Which Apple has not been able to do across the board.
(a) There is pressure from many governments to give backdoor for surveillance. Or just comply with subpoenas that are against human rights.
(b) Complying with local laws generates PR damage. It makes privacy and ethics as a brand strategy look disingenuous.
The solution is, of course, to generate truly secure system where Apple can't make backdoors. Those services may not be available in some countries, but then it's just missing service, not a compromised system.