"here is why we're doing it anyway.": 1. Because if you even use SecureBoot then not booting is a better alternative than your security being compromised. 2.

"here is why we're doing it anyway.": 1. Because if you even use SecureBoot then not booting is a better alternative than your security being compromised. 2. Because you can do a rescue boot and update other relevant software. 3. Because if you really want to, you can just disable SecureBoot.