The metaphor goes further than that - you're not being paid to paint a masterpiece, you're being paid to be part of a 5 person team repainting the sistine chapel. That again is a totally different skillset.
Most of us aren't even doing that. We're slapping on a new coat of Stonington Grey on the walls and touching up the trim of apartment buildings...
It's important to take pride in your work but also to have a crystal clear image of what that work is supposed to be. Mistaking an apartment renovation for building the Burj Khalifa is the source of so much heartache.
Today we're renovating an apartment. Tomorrow, maybe we'll want to build it into the Burj Khalifa.