Perfect is only possible for what you already know.
Some work should be close to perfect: the tax return, the aircraft, anything where an error causes real harm. Most work is not like that. Yet a routine email you could have worded better can feel as serious as building a plane.
Perfectionism often grows out of places where mistakes were punished. It sticks around because it works, up to a point, since people under that pressure tend to do extra. The cost shows up somewhere else. You can only make something perfect when you know it well, so perfectionism keeps people polishing familiar work and steering away from new work, where there is no history to lean on. That is where innovation and learning stall.