It’s disputed because its equal amounts of distance from a large Canadian island (essentially mainland) and mainland Greenland. We don’t actually really care at all about that small Canadian island but it’s fun to joke about
Its pretty wholesome . I was joking about the way China has been fortifying disputed island, hell they're making artificial islands and saying that it extends the globally accepted territorial waters and telling aircraft that they are violating their air space. It's going to get to be a hairy situation if they keep on making their own rules.
If I recall correctly they largely only care because of it's potential as a waypoint to the Arctic or something like that. Either way, I posted this a long time ago but still: https://satwcomic.com/epic-battle
*head flaps angrily