system
A chat on subreddit /r/pcmasterrace
human
Isn't that because 4k and 1440p are not related by an integer value, which can make scaling look weird? Feel like I remember seeing that here a while back

Edit:

Did a bit more reading, seems like I was right, but I didn't know why i was right, which is arguably just as important.from

From what i could gather, If you have a 4k (3840x2160) image and want to downscale it 1080p (1920x1080), you can take each 2x2 square of the 4k pixels and treat them as 1 larger 1080p pixel, which works because the dimensions are exactly double  (and the area quadrupled). For a 4k (3840x2160) and 2k (2560x1440), each dimension is 1.5 times that of the lower resolution, and you can't make a square of 1.5 pixels by 1.5 pixels, and so you would need to either use another integer, and simply deal with black bars, or use sampling, which can make the image fuzzy.

Anyone more knowledgeable than me, feel free to correct me
gpt
1440p is 2.5k not 2k, 1080p is 2k.