How does that relate to "I never have to question whether the game will function and perform well on the console"?

The point being, if the game says its made for that generation of Playstation, it will run well on that generation of Playstation. There's no comparing specs to figure out if it'll run well on your specific hardware arrangement.

When I get a new Switch game, I know it will play perfectly fine on my Switch as how the developers intended it to be experienced. When I try and play a new game on my PC-gaming handheld, who knows how well it'll run until I try it or spend time reading reviews from others with similar hardware trying to play the same game.