Cuban cigars are available elsewhere in the world. They can export to non-US countries (including Canada and Mexico).
Non-US tourists visit Cuba on holiday (and stay at places that are OFF LIMITS to any Cubans who are not working at them).
The US embargo is NOT the sole reason for the crappy state of affairs in Cuba. If all of the world had shared in the embargo, it might have done more to change things.
Don’t cross Elian Gonzales kid. You might find yourself in Holguim.