Yichusdic, excelent kasha.
Coffee addict, why did the Yidden in times of Moshe, Yehoshua or Dovid need an army, for crying out loud? And you can not compare the geopolitical and military realities of Israel and America!
Avi K, a Yid is obligated to learn the whole time inless he has a heter not to learn. The Gemora says this what he was created for.