If it were only that simple. Of course, crank balancing is incredibly important. But if you’ve seen how far the balance can be and not break anything you’d have a different opinion.
The crank is constantly twisting and untwisting. The damper is there to absorb those forces.
That’s why I said I wouldn’t do a cast crank 4 inch stroke on 340 mains. There isn’t enough overlap. When there isn’t enough overlap, the crank fails. Or, the crank is so thick through overlap that you needless added weigh when the better option was a steel crank.