The Cubans made got in bed with the Soviets in the 50s and failed to ever pay any attention to the changing global landscape all of that time, instead continuing to put all their reliance on commies and sandpeople without any concern that they are a tiny little island that could starve at any second. They made their bed. Lie in it.

I'm pretty sure people survived there before electricity. You're surrounded by fishable waters, there's gotta be bananas or mangoes or something growing.