A lot of people make stupid cases. Should giving birth be dangerous so that people are reluctant to have unwanted children? Should sending email be dangerous so that people receive less viagra spam?
There are many good reasons not to make war too easy or efficient. Too often politicians trend toward groupthink and acting en masse, like a faceless feckless mob. Making invasion as easy as sending spam would be very bad.
If politicians make bad decisions, perhaps you should try fixing that instead of sacrificing the lives of young men for a small chance of making those decisions more painful.