> USB terminal USB Type-C terminal Used for charging or for connecting to the Nintendo Switch dock.
As does the Japanese site[2]:
> USB Type-C™端子
[1] https://www.nintendo.co.uk/Nintendo-Switch/Specifications/Sp...
As much as it pains me to say it, a "pay us to use the port shape" group like HDMI that will threaten litigation unless you pay them to use the port would probably have prevented this kind of thing from being as widespread with USB-C as it is. While just about everyone doesn't want that to be the case (myself included), I don't see any other way of aligning incentives to make it harder to use the port/spec incorrectly than it is to make it correctly.
It solved enough design issues for them to let go their old habit of having proprietary connectors for charging. Which made them a lot of money.
(Why do you care about DisplayPort? Can't you get a converter in the other direction?
[0] https://www.tweaktown.com/news/56650/switch-dock-uses-mobili...
Note: There is probably an ethical issue with this, but it doesn't jump out at me.