qwerty: it was to teach us how to prepare when we have to deal with Eisav and, of course, his descendants. Neither you nor I are on the front lines, so our responsibility is different.
You may be right regarding the actions, but we Jews, as a group, need to somehow agree on what is important. There are people/groups that emphasize “self improvement” as an explicit alternative to supporting those who are fighting. I hope we come closer to a joint view here. And it is probably a big source of frustration for many people in US that there is not much we can do. Still, people find opportunities – some places packed/donated for the gear for soldiers, others went on tours packing and doing other jobs in Israel where usual workers deployed.
Disclaimer: there are halachos and daas torah who make these decisions, not “we as a group”