A lot of visual professional apps tend to be color neutral so you don't bias your work. Whether for trendiness or for functional reasons they also all tend to use darker colors for their UI. This seems to extend to audio apps, too. For color-accurate work ambient light is lowered (windows are covered and walls tend to be painted neutral). Even Photoshop transitioned to a darker-and-darker UI between CS4-CS6 (~2015).

It's really jarring when spending hours inside these apps and jump to a file browser or web browser and get blasted with light.