There are numerous examples when the electric cables marked with a proper gauge for the load are actually made with a thinner ones. This is exactly the problem

There are numerous examples when the electric cables marked with a proper gauge for the load are actually made with a thinner ones. This is exactly the problem with the extension cords and power strips which literally melt under any serious load (ie kettle and like). Add to that what now you would need USB-PD chip in any cable, what you cannot use the cable if the chip dies, what they would go directly to the landfill. Hell, even CAT5 ethernet cables are made of shit for decades, I personally witnessed reruns needed for the lines which were laid with a 'proper' (on the pack) cable, yet didn't work at any meaningful distance.