For many reasons: - Potential single point of failure with control center. - Potential for failure due to poor QA since commercial company delegated too much responsibility. - Lack of accountability for said company due to incompatible legal code. - More expensive than just hiring a bunch of trusted government guys to take shifts watching the doors old-fashioned style. - If necessary, dual-key locks like on a submarine. KISS approach is usually better and cheaper, and if more expensive worth it in long run. Also more accountability for operators.

What happens if there is an electrical short circuit or if a power station is him, we are only going to be opening up the shelters when the missiles are flying and power stations are major targets so nobody can get into the shelter. Will the machinery be maintained regularly, a system like that needs maintenance and if the shelter isn't used for years at a time is the city really going to think about checking up on a system they may never need to use? Beurucrats are not famous for getting things done so what happens if this thing is left for years at a time without maintenance and there are problems but nobody has checked it and then war breaks out and the super system doesn't work so nobody can get into the shelter. At least when its done the low tec way people know where they shelters are, they know they got to open up and when your doing it manually what can go wrong?

Yes I know it is pikuach nefesh, but sometimes that isn't always enough. My local shelter is in a synagogue. The rabbi insisted that the men and women be kept separate (at a time of pikuach nefesh), but the city told them that if that was done funding for the synagouge would be cut.