Why can't texture quality be low? (Dying Light)

Because the developers intended it that way. What do you dislike about the average? Wait better when the patch will be posted on PG.

there are some textures and on the middles look like soap

Where is it lower?

Ept because the matrix starts to crawl out on average, so they ask for low brakes people do not turn on not all processors are powerful

low slaves were not included - they forgot how low is written in English

You can enable it, you need to open the video.scr file with notepad, and there is a line texturequality set to Low