Art is first and foremost for the artist.
If you are easily grossed out, you might not want to ready any further.
When I was studying in Switzerland 20 years ago, I did a case study on sustainable agriculture that looked at pork production. That is really not a clean business, and a slaughterhouse is probably one of the last places you'd expect to find art.
In modern pork processing plants, the hogs are transported in on trucks, then killed and strung up by their hind legs on a conveyor. When they enter the slaughterhouse itself, the first cut opens the belly of the pig and all the guts and innards come out. It is the most extreme messy, gross, smelly job I can imagine.
The plant engineers were looking at designing a machine to do this job so that a person would not have to do it. When they talked with the man doing this job, his response was unexpected. Every pig is different. Some are bigger, others fatter, some not entirely symmetrical. Each cut was specific to the pig. Sometimes it was a straight cut, other times more of a lazy S.
Sure, it was a question of efficiency and getting the most meat from the pig. More than that, the pig cutter had found an art in that gross task of slicing open 300 pigs a day. It was an expression of who he was and the excellence in his craft.
Your customers don't come in upside down on a conveyor belt, but your employees are every bit as human as the pig cutter. That means that somewhere in them is a need to find an art - a discipline of expression.
You can't pull it out of them - they gotta wanna. But when they do, it brings a sense of excellence and pride to their work.
Does that mean that customers who are backed up out the door are going to be happier knowing that someone in front of them is getting a latte art version of Eduard Moench's "The Scream"? F'k no.
Do we sell more coffee when our employees have a sense of excellence and pride - even passion - in their work? Hell yes.