Now tell me how

Turning off UEFI secure boot on a PC to install another "unsecure distribution"

vs.

Unlocking fastboot bootloader on Android to install another "unsecure ROM"

... is not the exact same language, which isn"t really about security but about absolute control of the device.

The parallels are astounding, given that Microsoft's signing process of binaries also meanwhile depends on WHQL and the Microsoft Store. Unsigned binaries can't be installed unless you "disable security features".

My point is that it has absolutely nothing to do with actual security improvements.

Google could've invested that money instead into building an EDR and called it Android Defender or something. Everyone worried about security would've installed that Antivirus. And on top of it, all the fake Anti Viruses in the Google Play Store (that haven't been removed by Google btw) would have no scamming business model anymore either.

"... is not the exact same language, which isn"t really about security but about absolute control of the device.

The parallels are astounding, given that Microsoft's signing process of binaries also meanwhile depends on WHQL and the Microsoft Store. Unsigned binaries can't be installed unless you "disable security features".

My point is that it has absolutely nothing to do with actual security improvements."

I agree. It is the same type of language.