Actually Red, the book I am reading explains it well. In the first couple of years we are home we struggle to 'Fit In'. Society doesn't check all the boxes. People walk around complaining about trivial things. That is why warriors who return home would rather be back over there.
I have mentioned it before, but here is an exert from his book.
'One Infantry soldier several months after returning home said "Through all the hell and anguish I have experienced fighting a war, I'd still rather be fighting a war than wake up every day to the bullshit I have to deal with and overcome here at home and what I call a job and life".
To me he is saying that soldiers are trained to do one thing. Follow orders, have discipline, and fight when they are told to fight. Being discharged and having to deal with an undisciplined society just does not compute.
I think once a warrior has been home a few years and has dealt with their PTSD a bit, they will change their tune when it comes to wanting to go back into battle.
I personally loved the way of life and would love to go back to doing what I did, but I think I would be more scared going back into battle than I was the first time. Anyone that says they were not scared is a liar.