it's not that a rooster can't make soup, but that a rooster is not suitable for stewing soup.

When stewing chicken soup, people prefer to stew it with hens, because the meat of cocks is more delicate than hens. If you stew the soup, the soup often looks clear and watery, and it is not delicious. The melting point of hen's fat is relatively low, so it is easy to stew hen's fat when stewing chicken soup, and the stewed chicken soup will be more delicious and nutritious.