There's no need to argue with others. Even if the finger sticks out, the length and thickness are different. What does this mean?

If you don't tune your music well, don't compare with others, because even if your fingers stick out, the length and thickness will not be the same. This shows that in artistic expression or competition, what is needed first is self-preparation and self-improvement, not comparison with others. In addition, this sentence also reminds people to accept their own advantages and disadvantages and not to pursue perfection too much.