Trey Anastasio, in an interview with The Believer, on orchestral musicians:
Musicians come and go and they’re stewards of the music for a brief period of time. But once the music plays—it’s really between Beethoven and the listener at that point. The musicians are there to get their goddamn hands off of it. All that training! Thousands of hours! Sight-reading every day! All so they can get the hell out of the way because nobody gives a crap about them at all. The less you notice them, the better it sounds. I mean, it was the highest level of art in music that I’d ever seen, and it was performed by people who had spent countless hours of work just to be invisible.
This applies to so many roles in great design and development.