UEFI != Secure Boot
UEFI is not Secure Boot. UEFI existed for many years before Secure Boot. Secure Boot is an effectively optional part of the UEFI spec that was added in later revisions, and really isn't particularly tied to it; the desire for a cryptographically secured boot chain has existed for a long time and would have existed if UEFI had never been created. If UEFI hadn't been around, the same idea would just have been attached to some other firmware format (you could build something like Secure Boot on top of BIOS, if you really wanted to).
UEFI is a development of EFI, which was created by Intel, not Microsoft. It's maintained by a consortium of pretty much every significant company in personal computing, including Microsoft but also everyone else.
Biting the hand that feeds IT
