Lu Xuan nodded noncommittally.
Of course, it's useful.
In fact, every organ in the human body has its function. Some organs seem to have no function in daily life, and even removing them seems fine. But when you really need them, their roles become apparent.
Otherwise, as the other party said, if something was truly useless, it would have been eliminated through evolution long ago.
If it hasn't been eliminated, that means it still has its use.
It's just that this function isn't so obvious in everyday life.
Sometimes, all you see is the trouble it causes the body.
For instance, the tonsils are like this.
Western medicine generally recommends surgical removal for enlarged tonsils, especially those above grade three. Some countries even remove them right after birth to prevent tonsillitis later on.
But once the tonsils are removed, the body loses a natural barrier.
Previously, when there was a problem, the tonsils would inflame and alert the body to the issue.
