Upscaling makes the game noticeably blurry vs native, it loses some of that sharpness, clarity and fidelity in favor of better FPS,
This is just a matter of sharpening as current AA methods also incur heavy blur. They just tend to default to better sharpening than DLSS, which often defaults to no sharpening, but this is easily fixed. FSR often tends to be sharper than native (i’d say it’s often even overtuned) as it includes CAS and it’s often better than the default sharpening pass with native.
Blur and clarity is not a good argument against DLSS/FSR as it’s just a matter of what filter you apply to the game.
Consoles are the baseline in most multiplat games and they’ve been using upscaling since forever. The real reason is just that we don’t have GPUs anymore that are 10x faster than consoles like last gen. You can’t bruteforce high resolutions in games that run at like 720p on consoles with GPUs that are only 2-3x faster.
If upscaling didn’t exist on PC the minimum here would just be 720p at the minimum and 1080p-1440p at the max.