they couldn't be bothered to add USB pd
The Pi absolutely uses USB PD, it's just that the 5V/5A profile isn't a mandatory one and not supported by many power supplies. And 3A supplies work as well, you just can't pull massive amounts of power via USB.
The Pi absolutely uses USB PD, it's just that the 5V/5A profile isn't a mandatory one and not supported by many power supplies. And 3A supplies work as well, you just can't pull massive amounts of power via USB.