Earlier quoted context omitted.
> After spending a couple weeks in Cuba it’s not hard to see why. Which is the consequence of being sanctioned into oblivion for decades by the global hegemon, much to the dislike of the entire rest of the world.
The US has been the the only major country sanctioning Cuba for a decade and a half, but the economy has only gotten worse. Sanctions may explain why they has lagged behind in tech. It doesn't explain why Cuba needs to import 70-80% of their food despite being a fertile tropical paradise. https://www.wfpusa.org/countries/cuba/#:~:text=Cuba%20import... .
Which is enough, as the US controls the emission of dollars, have monopolies over several technologies and, as it extends the sanctions even to the ships that trade in Cuba, disallowing them to enter in US, on practice it difficult trades between Cuba and any other country.
> It doesn't explain why Cuba needs to import 70-80% of their food despite being a fertile tropical paradise.
Modern agriculture depends on machines and fertilizers. And if you go without modern technology, climate change and shortages of water can be an even greater blow to your production. You will produce food, but will be susceptible to famine crisis, as were all countries before sufficient technological development.
Moreover, Cuba is also not an agrarian country. The urban population is greater than the rural, like in any modern country. Remember that societies without much technology had to have a much greater part of population in rural areas instead of cities to be self-sufficient in food.