What I am describing above is just the current method. The one which is currently implemented in most x86 UEFI hardware save for apparently this one Lenovo lapt

What I am describing above is just the current method. The one which is currently implemented in most x86 UEFI hardware save for apparently this one Lenovo laptop and some other "miscarriaged" hardware. You do not even need to imagine "what I am proposing" because I am not proposing anything whatsoever: the MS UEFI CA signs non-MS operating systems. MS just needs to not relent on its promises.