Since most people aren't high level threats, and since the iPhone is a consumer electronics device, Apple start off towards the convenience end of the spectrum. Siri and Control Center access from the Lock screen are turned on, and a 4-digit Passcode as default rather than a complex alphanumeric password. Anyone who wants more security can turn off that access and ramp up that password. It'll make their iPhone far less convenient, but it'll also make it far more secure.
But never ignore this: If you have an iPhone, someone, somehow, can get accessibility it if what's on it is useful enough and they want that accessibility poorly enough. The only actual way to secure something is not to have it.
If you're considering an iPhone 5s, don't let rubbish non-stories prevent you. If you've already got one, don't get misled into switching off functions that, overall, offer a excellent stability of comfort and protection. If you're involved about protection, get your cellphone, and allow the functions that let you do what you need to do as safely as possible.
Then go returning to the dumbass websites that mindlessly distribute this type of ridiculous and requirement better from them. Or just prevent them and also out here on iMore.
Either way, they'll go where your clicks/taps are.
iPhone 5s
Apple's current flagship iPhone with a 4-inch in-cell display, LTE 4G, and BT 4.0 LE. New features include:
Touch ID fingerprint sensor A7 64-bit processor M7 motion coprocessor iSight 120fps video iOS 7 software
Released
September, 2013AlternativesiPhone 5c, iPhone 4sReplacementsiPhone 6 (rumored)Fall, 2014ResourcesBuyers guideHelp forum