So they push tech forwards. Glad you conceded to that.Sony hasn't pushed rendering tech - which is 90% of what you see on the screen. Yes, they did push the animation tech in TLOU 2 but that's one game and that game was recent.
All the other tech like PBR shaders, RT, physics, AI, water, volume rendering, etc.. was made by some 3rd party studio over the years.
They also did it with TLOU1.
They are also pushing tech forwards with reconstruction techniques, see the recent R&C. There are plenty of examples of Sony pushing tech forwards.