Sorry, I think this must remain a fantasy. Physics is unlikely to comply with your request, no matter how convenient it would be.
USB-C is currently specified for 1.25 amps per pin at 48 volts. If you decide you don't need any data wires and make all 24 pins hot, with the shield as the return path, that's already 1500 watts. And I'm sure you could tweak it to get somewhat more.
Protocol and pinout incompatibility is a bad idea but it has nothing to do with physics.
Also as a sibling comment states, it's arguably not a worse violation of those things than the existing ability to change voltage.
The hypothetical was reusing the plug, not reusing existing cables.
The person you were responding to explicitly mentioned that the cables would need to be upgraded.
For example, a full-size extension cord can be soldered to a USB-C plug without much difficulty.
Whatever wire gauge you want, it can be done. The bottleneck is the pins, and there's 24 of them.