With Android you have a choice to buy devices with unlockable bootloader so you can get root without looking for on exploit. On iOS you have none such. And the

With Android you have a choice to buy devices with unlockable bootloader so you can get root without looking for on exploit. On iOS you have none such. And the fact that every iOS version ever has been jailbroken only tells you how hard security is... specially against an adversary with full physical access to the device.