AMA: Microsoft Store and Windows app management

A recent Intune update added support for System wide context for UWP apps when installed via the new store mechanism - https://learn.microsoft.com/en-us/mem/intune/fundamentals/whats-new#system-context-support-for-uwp-apps. This is fine when installing via Intune, but if you try and install the same UWP app from the msstore repo via the winget command line, scoping the installation to the machine via the --scope machine option then winget responds "Device wide install for msstore type is not supported under admin context". Why is such an installation possible via Intune but the same app cannot be installed in the same context from the command line?