"you might as well just leave it at home"
Sure, fat lot of good it does there. Hundreds of glock NDs could have been prevented had the owners practiced Israeli carry instead of "shoot myself bubba" carry because, ya know, you neva know.
Israel military carries condition 3. You are not without company.
First of all, people who carry pistols in Israel (police, Mossad, CCW, etc.) carry them exactly the same way we do here, one in the chamber.
The Israeli ARMY, for a long period carried military weapons with an empty chamber for the simple reason that they had a mish-mash of different small arms in the field, all with different manuals of arms.
Rather than try and teach each raw recruit, who might never have even touched a gun before, the difference between how to run a Galil versus a captured AK versus a donated FAL versus an M-16 they dumbed it down as much as possible.
After all, it's pretty rare for a solder NOT to know when they were going into combat, which gave them plenty of time to load their weapons. I doubt US soldiers walk around at all times with their M4s loaded and chambered. They load up when they are approaching combat.
Again, that's the Army, and has nothing to do with how people who depend on instant access to their weapons carry in Israel.