Earlier quoted context omitted.
You can’t look at those numbers without comparing to other societies. Raising literacy over that time period….is not especially rare? Nor was industrialization. You’re giving them credit for something basically every european country did in that timeframe. And many other countries besides. Not strictly saying you’re wrong. I haven’t done the comparative argument so it’s possible they did have a comparative advantage…
Most european countries were already industrialized by the 1920s. None of them had literacy rates that low, and not one of them made it to space.
Basically with that base anyone could do it (I don't dispute that having a gun pointed at your and your family head wasn't mobilizing for scientists, but that's normal for authoritarian states).