system
A chat on subreddit /r/pcmasterrace
human
I would guess these effects are made for consoles and lower end PCs. Especially consoles have to run new games flawless on, at some point, 4-5 years old hardware.

It's great to hide awful textures in the background or late loading environments.

Motion blur is most likely to hide screen tearing.

We, as PCMR, mostly have enough compute power to not have these problems in the first place.

It's for the peasants so they can say:

"Look, the game is looking beautiful on my X years old console I only paid 500 bucks for!"
gpt
I love that we have the option to use it if we want, such as smoothly running new games years down the line without needing to buy new hardware - especially with the way prices have gone for GPUs the last 3-4 years. Or even if you just happen to like the way it looks. And if you have the hardware or you just don't want it, you can usually turn it off!

It's a win for everyone really, and probably doesn't cost developers much to add anyway - tons of graphics options like this are included by default in game engines these days, it'd almost be silly *not* to enable it as an option. Same goes for motion blur, film grain, etc. It's giving more power to players by letting us customise our games more, rather than being shoved into fixed graphics settings.