Try visiting Cuba before damning the USA. Prison state, damnable poverty, and the Marxist SOB's often choose to turn flights away from their airspace which have been filed and have Overflight Clearance.
And a medical emergency would be a sentence of death if the poor person was taken to a Cuban hospital. Forget the propaganda to which many fall prey to. The Cuban medical system is almost non-existent in practice.
Yep, I've lived in Cuba, worked there, and also lived and worked in the USA. In commercial aviation.Qualified.
I actually have, flying in and out of Cuba for years, and across it on the way from US/CAN to CAR/SAM destinations. Never any problem. Courteous and pretty well english speaking ATC.
Their political system does not work, no bones about it, but therein lies no threat to the US.
The Cuban medical system is probably very limited in its resources except people, Cuba provides doctors and nurses to many SAM countries where they probably get more resources to work with.