As a former professional warrior, I consider it my responsibility to go into combat.
I am a warrior.
I am trained to complete my mission, because I have spent many years learning tactics, the operational arts, combined with the efficient use of firepower.
What you see here on FR is a recognition by former professionals who understand that it takes many years of practice, discipline, and money to trian professional soldiers who are able to subdue emotions for a greater good.
Elite Soliders are not "itchy" for combat - but they recognize that they are prepared emotionally, they are trained, and it falls to them to do the ugly job - and they do it.
That's the difference between young recruits just out of boot
The professional soldier, with nearly 15 years of training, will enter a building, engage the enemy, kill the enemy, complete the assignment and then self-extracate, if needed.
The young warrior is willing - but likely to make mistakes more often because of inexperience, unfamiliarity, and emotional reaction.
So, if someone has to go - the professional will volunteer to go because he doesn't want his buddies to be killed. He goes to protect them, and to complete the mission.
You have spoken the truth here, especially for those who have been in combat.