To explain what I mean by this, let me tell you a story.
Back in the late 70s I was a student at the City and Guilds of London Art School, in England.
Back then the school took a pretty traditional approach to teaching art, and as first-year students we had to do a lot of drawing. In particular, we did a lot of life drawing.
We had a teacher, whose name I unfortunately forget, who used to make sure we didn’t become too “precious” with our drawings.
What is being “precious” when you are drawing? It’s when, instead of seeing the entire form, and drawing the figure as one whole, you start fussing over the eyebrows or toes. In other words, it’s when you play around with the details before you have penciled in a working drawing of the entire form of the figure.