So, after all the complaining that cross gen games would hold everything back for the next couple years, what you and the others are now saying is that these same cross gen games are so potent, that the XsX can't even run them?
Simple question, yes or no?
The argument that game structure and design can be simplified to graphism and/or framerate is simply wrong.
I don't think that the portals or the world switching (in Ratchet and the medium) could be done and be agreable to play on regular HDD.
Imagine the medium when you press a button it just switches world on SSD but with an HDD it becomes the loading time button, loading for each switch would be incredibly cumbersome.
Of course some games had similar approach done already (like titanfall 2) but in fact it is a sort of teleportation that moves you toward a mirrorlike part of the level it has to be in ram then you basically lose a lot of effects and possibilities.
It is a valid argument for IA and lots of other things but it does not mean that no older games can fully uses thoses consoles.
It will just uses them in a less effective way.
The ps5 and xsx struggling with rez or framerate does not mean they won't get better when games will be better suited to uses their specifications.It is simply an indicator of the consoles performances for games that are more resource heavy than they should.
Once more optimized we will see better looking games and probably some new standards of gameplay.But they can be more beautiful while stressing less the consoles through optimisation.
It is also a question of pushing more the framerates, a cross gen game running at twice or even 4x the number of fps is a simple way of using this extra power that next gen provides.
So to answer in a shorter way your question, yes crossgen games running at twice or 4 times the res of their previous gen games can put consoles to their knees, but it does not prevent them from holding other games back because the two aren't linked.
If you want another example it has been said that in Kena you have about a 100 little spirits with you (I don't know the name of the creatures)On ps5 you can render them and their IA, it is not the case on ps4.Now imagine that you can command each of the individually for different orders effects or attacks, then you can't do as much as the ps5 version on ps4.It does not mean than the ps4 version upping the rez and framerate can't put ps5 to its knees.
Optimisation is important as well as fully using what is available to the hardware.
So a simple question that mix games structure/design and graphism can't be answered by a yes/no just like saying if I have more gas in my car does not mean that I will go further than your car.