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It was a hypothetical example for crying out loud. And the point is, whatever a theoretical TLoU 3 looks like on PS5 at 60 fps, it'll look a lot better at 30 fps. That'll be true until we can achieve photorealism at 60 fps. Unless you deny that screenshots and overall visual appeal won't be better at 30 fps than 60 fps, stop arguing against this fact.
The pro-60 fps side argues about the benefits to gameplay and player experience. They don't try arguing that 30 fps games won't look better. If you want to argue that the media will start raving more about game fluidity than eye-candy, go present some examples. Hell, present any evidence in favour of your argument, please! Anything to show 60 fps sell better, or get more media coverage on account of their higher framerates, etc.
I would argue that most games look better at 60fps in motion, and 30fps games only look better in screenshots. There was no mechanism for mass-distributed game trailers at 60Hz until 2014. I'd love to see data on performance modes on PS4 Pro and Xbox One X. It's a difficult sell for me that 30Hz looks better when it has such a negative impact on any camera movement from blur and judder, and it's impact on any kind of animation from characters to particles, or animated textures. For some reason motion doesn't count when people evaluate image quality, and I believe that's mostly because people are unequipped to evaluate it, and it's easier to compare screenshots. Screenshots really have nothing to do with gaming because you don't play screenshots.
With the exception of people with very large tvs, or people who sit abnormally close to their tvs, there is already a diminishing return on resolution past 1080p. Returns on frame rate don't start to diminish until around 120Hz.