Why would an artist use thick brush strokes?
It does, like you said, create a lot of depth for the mind. Strokes can be compared to the guitar: Thinner strokes of a brush, just like shredding on a guitar, is more of a way to compliment skill and to see how good of an artist, or musician, they are, rather than getting absorbed into what was actually painted. Thicker strokes, just like a guitar player throwing his soul into a simple riff, is more of a way to have your mind and soul focus on the painting, or chords, and get completely lost in ocean-depth thought, rather than giving a crap about the skill involved. At least that’s what I see when I look at it.