Why Cuba and Venezuela would not need nuclear submarines

Why would Venezuela or Cuba need nuclear submarines?

They would not; diesel-electric boats fit their shorter operating distances and could be more practical local threats.

Venezuela and Cuba have no geographic need to operate nuclear submarines. Their likely patrol areas are far smaller than Australia's and do not demand extreme endurance. A supporting power could supply diesel boats and the fuel needed to sustain them locally. Quiet conventional submarines in Caribbean waters could create a serious anti-submarine problem for the United States without the cost and complexity of nuclear propulsion. The answer makes operating distance, not prestige, the deciding force-structure question.