Question

I heard a Religious Zionist rabbi argue that a Haredi man who avoids military service out of concern for his fear of Heaven in a mixed-gender environment falls under the category of “foolish piety,” as presented in the Talmud, since he refrains from saving lives because of considerations of modesty. I also saw that in your view the obligation to enlist stems from saving life, so I wanted to ask whether such an argument is also acceptable to you. To me it is difficult, because it expands saving life enormously—from a specific incident to a general and ongoing situation. Would we then permit violating(almost) any prohibition in order to enlist, because it is a matter of saving life?