Earlier quoted context omitted.
All Google phones and Android One devices have unlockable bootloaders.
Rooting the Pixel 2 (I haven't tried the other Pixels) is not trivial for the average user, it still involves downloading third-party software and doing stuff on the command line. I had hoped that the pure-Google devices would have just had a switch: "I am now root," but alas it wasn't to be.
Some of this I can understand. Root permissions does introduce some additional security considerations. We haven't fixed this in decades of computer usage in a way that preserves security, ease of use, and giving people easy access under the hood.
My mother would click any number of scary UAC prompts in Windows just to get to the webpage she's trying to get to. That's not Windows' fault, but it is reality.