Gatekeeper didnt even use TLS, the most basic of security features, so security and privacy were the last things apple were thinking about when they came up with the idea for gatekeeper. This should alarm anyone with their ear to the ground

As for the FBI not being able to unlock phones is exactly what they want you to think, because they do it for money on the regular allegedly.

EDIT: the link you sent is two years old, so IDK why youre complainin about my link being 2 years old