Earlier quoted context omitted.
Android is open source.
What is your point? This kind of response completely ignores the fact that the vast majority of the drivers required to just run on modern hardware are closed source and that the vast majority of phones these days have their bootloaders locked.
I don't know if that is actually still true. Back in the day nearly every phone in the US was bootloader and carrier locked. Now basically every phone is carrier unlocked and anything besides Samsung can have the bootloader unlocked very easily. I guess Samsung phones are the most common but there are certainly many other options that are more open.