That sort of order is out of scope of anything a US court can order, and I believe that an Apple employee would leak it before they complied with such an order.
They don't need to create a special backdoor for the government, Apple has it's own backdoor that it can share with the government if needed... (they have full control of your device already when you are online)
How is that out of scope? Haven't they been doing exactly this for at least five years? Miscrosoft backdoors et al?
And I think an Apple employee is that last person that would leak anything. They work for Apple after all, starting to work there surely takes some abandonment of principle.
In the end, why would anybody feel assured by what someone believes someone else would do?
Edit: Why is imaginenore downvoted so heavily? His concerns seem rather rudimentary.