I think the objectivity here is that it is what the artist intended.
Not true anymore for modern pixel art, which is often an art style intended for modern displays, and it is sometimes combined with high resolution images and transforms.
"Objectively the artists intended the art to be viewed on a CRT" is a very different statement than "Objectively the art looks better on a CRT"
Yeah, it's just not your grandmother's pixel art anymore
If we had an artist's statement of intent for a particular piece, that might be a reasonable argument.
That's an often repeated claim people make about pixel art and CRT monitors esp on social media, but I think it's just a trite bite that sounds good rather than something that's meaningful.
Example: https://x.com/kitten_beloved/status/1849159022479577277
Plenty of people debunking it including the person she took the screenshots from.