Krishna addresses the perfectionist's trap directly. Do not abandon your natural work just because it has flaws. Every action in this world carries some defect — just as every fire, no matter how bright, is accompanied by smoke.
A farmer ploughing the field unavoidably disturbs creatures in the soil. A doctor performing surgery causes temporary pain. A leader making decisions will never please everyone. If the standard for action is zero defect, then no one would ever do anything at all. The smoke cannot be separated from the fire.
This is one of the Gita's most liberating teachings. It frees a person from the paralysis of waiting for conditions to be perfect. Do your work. Accept the smoke. The fire — the warmth, the light, the purpose — is what matters.