Generally speaking, if you invest your money in a historically kleptocratic country, you can expect your investment to get confiscated if it's profitable, and possibly even if it's not, which is what happened to my retirement savings. Even if you make your investment at a time when the country is governed by non-kleptocrats, you will probably lose it after the next coup or election in which new kleptocrats come to power.
In that environment, where private investment in long-term infrastructure projects is irrational and languishing in poverty for many generations is the normal state of affairs, state capitalism frequently works.
I don't think moral arguments about atrocities are somehow orthogonal here. Power plants and electrical grids are often worthwhile investments, not because building monuments to Westinghouse is a pious sacrifice that pleases the electrical gods, but because they promote human welfare by providing material abundance. That's how we measure whether society is richer, not, as you say, by the amount of concrete poured. If human welfare is your yardstick, the possibility of economic catastrophes like the Holodomor greatly diminishing human welfare must necessarily weigh on the negative side of the balance. The inhabitants of Auschwitz and the Congo Free State were not enjoying even the material abundance they had enjoyed previously.
So we know that central planning carries risks to human welfare that decentralized systems do not. However, it also has opportunities to promote human welfare that decentralized systems do not. The variance is larger. I don't think we know enough to measure the expectation.