Anyone seriously interested in building a system that requires Secure Boot to be disabled should have the knowledge to turn it off. So enabling it by default is at worst a minor inconvenience.

The Secure Boot feature on as many as 300 MSI motherboards reportedly doesn't work as you might expect—or as the feature is intended. Specifically, the motherboards will allow unvalidated ...

However did that happen? Motherboard maker MSI might have accidently disabled some secure boot features on more than 290 MSI motherboards. The changes will allow any operating system image to ...

MSINFO says secure boot is unsupported so I assume it's actually turned off on my system instead of the turned on but still booting anything the system describes and I'll probably leave it that way.