A long time ago, I linked a Wiki article to my comments and if someone wants to research American based, NEC requirements, they're welcome to.
I live in a house with a 200 Amp service, GFI's, 20A circuits, use 20A, hospital grade plugs when replacing or upgrading outlets and have converted the house, when I can, to LED light bulbs and pay the higher tier rate of $0.31.KwH. It's called progress as electrically, for the most part, none of what is being done today is what was happening in standard, residential homes built in 50's. Life has moved on to that of what was happening sixty or more years ago as there are still houses out there using "Knob-n-Tube" and real fuses to power 5A living room circuits because when the house was built, all they had was a hand crank Victrola and a few tungsten style light bulbs..
If the NEC calls for something, that's what it gets. NEC requirement are fluid. There is no argument. If there's an argument to be had, take it to Washington or Sacramento as the NEC is the standard which contracting law follows. We don't hire hacks because we hire contractors that follow the NEC so the house will be up to current code and the law says, if you touch a circuit, the system needs to be brought up to code and for good reason, safety.
The comment had to do with electric plugs being "polarized" (which they are) and unarguably, you're trying to make an argument where there isn't one. Enjoy your argument as my comment was simple, outlets and cord plugs "are" polarized (this is irrefutable) and are done so because that's what "TODAY'S" electric standards demand.