When I was in the military we did not have this capability, either. We did not have GPS and many other toys we have today. Nonetheless, we do have them today. In use, issued to the troops, combat tested, fired by howitzers, even heavy mortars. Try to keep up with the times.As a former military member I can clearly tell you have no clue. A howitzer shell, while fairly accurate, is not that accurate. Even the Iron Dome system is not perfect.
Also, yes, bring on the ICC, I'd love to see Hamas, the PLO, etc answer for their deliberate attacks on civilians. Israel has caused civilian casualties in defence, totally different than attacking/bombing buses, cafes, university campuses.