To the contrary, the WireLurker victims took knowing and deliberate steps to AVOID Apple's "walled garden" protocols, getting apps from outside the Apple App Store and installing them via means not intended for such [ab]use.
While we may complain occasionally about Apple's app review process, this is a prime example of why it's in place and valuable. NO WireLurker-infected apps come from the Apple App Store. Get apps from there, and you won't have a problem.
Oh so Apple has not backdoored the NSA into everything then? What a relief.