Sorry for the typo, it was a little mistake.
The point is (in response to not knowing, I know you said you don't care, but this needs to be cleared up at least for others, as this concerns the community rather than something personal) that the game tells us Kirby flew from Point A to Point B, but the wiki says Kirby flew from Point A to Point C. As there is more evidence for Point B being the destination (outright stated) instead of Point C (A recurring pattern appearing in the background that would tie the destination to an area, but not by necessity), we now have to reconsider that this interpretation goes against what has been set out by the primary source, and so we must act accordingly, hence why this CRT exists: it's a content revision thread because it has come to light content needs revising. The reason the location of the Grand Doomer's battle matters is because the gif you posted which shows the feat in question takes place directly before the Grand Doomer's battle. So if it says the Grand Doomer came to Popstar whilst (and only whilst) you are fighting the Grand Doomer, then you are battling the Grand Doomer on Popstar. And if you are battling the Grand Doomer on Popstar, then the gif shows Kirby going from one point on Popstar to another.
This conclusion does not ignore past events such as a background appearing in Another Dimension up until this point, but rather says that this reoccurence is not an indication that every time it appears you are in Another dimension. (Not to mention the box art shows this background behind the Lor Starcutter, something intimately tied to the Energy Sphere, which also appears with this background numerous time in-game, whilst in Popstar's sky). Whilst it may appear Kirby flies from the top of Nutty Noon, we see his landing point is a higher point on Nutty Noon, so it does not ignore his point of origin either.
Whilst you may argue "no new points were made", it is because no new points are needed to counter your viewpoint, as your viewpoint has aged in light of information from the primary source. This is why a CRT was made, to revise the content in light of a concrete counterargument.