When someone opens a folder containing images you want to see what is in the image but not want to open it because going through hundreds of images can take some time especially when you don't remember what was the images name or the images name is the date when that image was made and you don't remember when you made that image, with icons view mode you can just quickly check the images and you could find it much faster than opening every single image.

When you enter a folder and if the most of the contents is videos or images then show the folder in icons view mode, if the folder's content majority isn't videos or images then use the previous view mode.

There should be a toggle for this because most people who use kde might not want this.