That's not true at all, Israel doesn't operate any courts in Gaza.
> Nothing can go into or out of Gaza, not even food, not even collected rainwater, without Israeli permission.
As I already explained, that's not true either — Gaza has a border with Egypt, too. But regardless, that's how borders between countries work: both parties have to agree over what can cross.
If you're making an argument about one country having a lot of economic and geopolitical influence on another, then you would have to make the same argument about any country on Earth and United States, and conclude that US is the only open political system.
No country in the world has total control of any other country's electricity, food rationing, water rationing, import / export, ability to work, ability to depart and arrive from the country.
You constantly mention Egypt as if it somehow makes all the facts I've stated false. But it does not. If they cooperate to create the same situation the situation does not change. There are still 2 million stateless people whose electricity, food, water, internet, and basically all access to the outside world is controlled by governments they are not citizens of.
The point is, it's as closed a political system as it gets. No matter what the polity does, their situation cannot change because they have no rights in the government that controls their lives (Israel)