Just like a movie theater, people are used to 24fps in a movie and anything else makes it seem weird and less dreamlike to transport them into the world. (But games aren't 24fps movies, I know. Not the point)

When you clean up all of the visual post processing, the game will look extremely clean. Which makes it feel like it's missing some kinda extra polish. People are so used to all of these elements added for a grounded and dirtier experience that without them it looks, and more importantly, feels too game-y for Ubisoft. (Counter-Strike is super clean, for example)

Look at Resident Evil 2 Remake and you see every single cinematic option in the book, down to lens distortion, being used and being able to be turned off in the settings. It's the look and feel the studio wants to go for.