Bleeding mechanics are unrealistic and annoying. Historically over 90% of the time you would die of infection in a battle. Be it a musket or bayonet wound. And having to worrying about bleeding out, aka shrinking health bar is just a pest during gameplay to think and worry about.
According to modern statistics, bleeding is the cause of death in 90% of cases.
If you do not bandage the wound, the person bleeds within a few minutes or hours! And the infection kills at least a few days or weeks ..
It turns out that the infection can be ignored in a similar game, and stopping bleeding becomes the top priority for survival "here and now."
The main task of the field surgeon is to stop the bleeding, and not to heal the wound on the battlefield!