Apple regularly ignores the law. It's incredibly disappointing that they're willing to do so when it harms consumers (all the non-compliance they've done over the years about in-app purchases and alternative app stores) but that they won't ignore the law when doing so would be beneficial to their customers.
IDK. I guess we should think about what this is physically analogous to. Say I operate an underground vault were I store sensitive documents for customers. Only customers have the keys to open their vault. There's nothing illegal about that, is there? If the government wants in, they can get a warrant and try to break into the vault without the key... can't they? There's no requirements that I intentionally make the vault have insecurities to help the government get in?
So it seems to me that the digital equivalent would be that Apple could receive a warrant forcing them to handover the encrypted data, but they'd be under no obligation to help decrypt it.