I sort of think it maybe is an exaggeration, you're evidently of the opinion that the U.S happens to have enough battle ready troops with the requisite hardware positioned within a few hours of Cuba so that they can invade and flatten in the time it takes to fly from Miami to Havana?

I don't know, but a Destroyer would take about 10 hours to get from Florida to Cuba.

It seems your definition of invade and flatten is just dropping bombs, but that definitely does not handle the invade part of things, and it remains to be seen as to whether, with drones, being able to fly non-stop is the great technological advantage it once was.

Some preliminary evidence from around the world suggests in a drone led conflict it confers the ability to have expensive hardware destroyed and pilots killed non-stop.