That’s not because of the hardware.
It’s because the developers made a horseshit design choice to go over the top on graphics to specifically target 30FPS. Multiply the power by 10 and tell them everyone has that and they’ll do the same thing, diminishing returns be damned.
That said, PlayStation has, and has convinced most developers to use, performance options to choose between graphics and frame rate.
FF16 in quality mode runs at 1440p 30 FPS locked upscaled to 4K. And it decreases resolution sometimes in my experience while playing it.
And in performance mode runs at 1080p targeting 60 FPS. The lower resolution it’s very noticeable.
Both modes can be improved by better hardware. That’s my point.
Now things like “30 FPS locked, sucks” or performance mode targeting 1080p is not enough quality is just my personal opinion. Of course some people enjoy 30 FPS or 1080p on a 4K big TV. I personally try to avoid 30 fps locks OR very low resolution performance modes. Games like GT7 or Warzone that can handle lot of FPS at a high resolution (on the current PS5 hardware) are the ones I don’t complain at all and truly enjoy. And in those 2 games I wouldn’t care about upgrading to better PS hardware.