Agreed about pointlessness in any case.
Usage is important.
The 'third parties never win elections' thing is likely in reference to America's mostly two-party system. This is for reasons unrelated to usage of words and has much more to do with campaign financing, gerrymandering, media control and so on. It's orders of magnitude more harmful but it is more or less by design and it will take a massive restructuring of American politics before something resembling proportional representation (aka democracy) will be a real possibility.
The Washington Post is owned by a tech guy (Jeff Bezos), so maybe you could try to get him to use a different word :)