I gathered that you knew that. I'm mostly just trying to complete the picture for those following along at home, who might find some of this resistor business to be a bit weird compared to the USBs of yore.
Except the old ways were weird in unseen ways, too. Some combinations of cable, phone, and charger worked well and some barely worked at all.
We're in much better shape with USB C and PD. It's generally a good, forward-looking way of doing all kinds of things.
I just wish the cables and ports were better-marked, and that manufacturers stopped fucking around by making non-compliant stuff, and that there were a clear way with two battery-equipped USB C devices to unequivocally declare that a particular one will charge the other (and not the other way 'round).
And yes: The non-compliant widgets should ideally be named, shamed, and Widlarized -- not simply tolerated or worked around.