“The problem is not that we have an army, but that those who learn Torah for the protection of other Yidden don’t learn with enough Hasmadah to merit that sort of protection. The reason why we need an army is not because of the Arabs, but due to our own Chesronos. Just look at everone taking Bain HaZmanim! Bain Hazmanim is not to vacation, but to learn a different Limud then your normal Sedarim (famous quote from Rav Gifter), but to keep the Hasmada up. Time is wasting, and there is much work to be done!”
Most Yeshivaleit are not like this. Some are. Serious Beni Torah are not the problem, and I think even ROB would agree that they should continue learning. It is the other 85% that is the problem, and creates a Shem Ra for the real learners.