The abdominal cavity was opened, and blood gushed out instantly.
For this temporary medical team, finding the point of bleeding was too simple. They didn't even need to look at it; they could guess roughly what was going on. Now that the abdomen was open, a mere glance was enough to determine the treatment plan.
"The spleen has ruptured, let's remove it..."
The spleen is fragile and easily ruptures from external forces. Since it houses many blood vessels, a rupture could cause major bleeding. Thus, the simplest and most common course of action was to remove it.
Because the spleen is fragile and suturing it is very difficult, average doctors couldn't perform the surgery. In many cases, to save the victim's life, it was necessary to remove the spleen and directly suture the blood vessels.
It wasn't just a matter of convenience to choose to remove the spleen.