Why the Ukrainian power system has not been destroyed, but only partially disrupted?

The main backbone, the backbone network with a voltage of 750 kV, continues to function quietly.
The backbone is concentrated in central and western Ukraine.This was done purposefully back in Soviet times, since the entire 750 kV network was created for the transportation of electricity from the nuclear power plants of the former Ukraine SSR to the MIR energy system (the unified energy system of the European COMECON member countries).

Recall that the power systems of the former Ukraine SSR, Bulgaria, Hungary, GDR, Poland, Romania and Czechoslovakia were controlled from the "Central Dispatch Control" of the MIR power system located in Prague.

There is still excessive generation of electricity in the western and central parts of Ukraine, which is transported to Europe via the 750 kV network (this network is highlighted with a bold red line on the map).

If the 750 kV network, together with substations (red triangles on map), is decommissioned by our missile strikes or kamikaze drone attacks, this will not only destroy the Ukrainian power system, but also completely nullify even the theoretical possibility of selling Ukrainian electricity to Western countries, since without the 750 kV network, Ukrainie will be forced to put nuclear power reactors into "cold" mode.

That's when a complete collapse of energy, transport and communications can really occur in Ukraine.

Why is Russia not yet striking at the 750 kV voltage backbone network?
There is an assumption that information has been brought to Kiev, Washington and London through unofficial channels that strikes will not be carried out on the backbone network yet, but if the Kiev regime tries to blow up the Kakhovka dam, then the retaliation will completely plunge Ukraine into the Stone Age.

@telestrim (https://t.me/telestrim/14637)