The guy raises a valid point.
Women provide emotional and psychological support to men during relationships. Men at the front are going through extreme emotional and psychological trauma. Usually these men are on their own and have to deal with their problems themselves. Many turn to alcoholism. The presence of women at army bases who can offer unconditional emotional support to these men at a price would greatly mitigate the affects of shell shock and the deleterious effects that shell-shock has on the lives of soldiers after the war. This is not speculation, by the way. Historically, soldiers and prostitutes have always gone together.
The only losers in this story is the women back home. The men at the front have certain emotional needs that need to be met, and, as their wives/gfs are absent, the men will turn to prostitutes to satisfy these emotional needs, as well as their sexual needs, instead. The women back home will feel that their men are committing emotional infidelity (as if there is such a thing) and will be greatly resentful of the sex workers. When the men eventually return home their women will resent them for no reason.
The best solution to these problems is to send the women back home to the army bases near the front so that they, themselves, can fulfill the role of the whores. That way, the soldiers can get the emotional and psychological support they need, sparing themselves the worst of shell-shock, and, simultaneously, the women the soldiers date back home will be safe in the knowledge that their men are not being emotionally unfaithful to them.
This is literally what we used to do before the industrial revolution.