Why does Apple make it difficult to reset / disable the Screen Time passcode -- why can't it be done via iCloud?
为什么Apple很难重置/禁用“屏幕时间”密码-为什么不能通过iCloud完成？
We believe it is to cater for users who don't set up an iCloud Family Sharing unit with their kids, but instead give them their own iPhone with their own iCloud account. Short of separately being able to register a parent on TouchID or FaceID, a secondary code is needed, as the child would have full access to their own iCloud settings.
It's also helpful to use a passcode rather than an iCloud account where these restrictions are applied en masse via MDM across many devices where there isn't a parent as such, such as on a school or company's devices. It's not just for restricting access for children using the device.
When the family are tied together in an iCloud Family share it would be possible. However, users would always need the option of some sort of passcode override for times when it matters: like being on a long journey with the family where there's no Internet. Most of the world doesn't have Wi-Fi during flights, for instance, so without a code it wouldn't be possible to change Family Sharing settings.
我们认为这是为了满足那些没有与孩子建立iCloud家庭共享单元的用户，而是为他们自己的iPhone提供自己的iCloud帐户。如果没有能够在TouchID或FaceID上注册父母，则需要使用辅助代码，因为孩子可以完全访问自己的iCloud设置。
使用密码而不是iCloud帐户也是有帮助的，其中这些限制通过MDM在许多没有父母的设备上一起应用，例如在学校或公司的设备上。这不仅仅限制使用该设备的儿童的访问权限。
当家庭在iCloud家庭共享中捆绑在一起时，这是可能的。但是，在重要的时候，用户总是需要选择某种密码覆盖：例如与没有互联网的家庭进行长途旅行。例如，世界上大多数地方在飞行期间没有Wi-Fi，因此如果没有代码，就无法更改“家庭共享”设置。