True, but the USSR wasn't originally founded as a one-man fascist state.
The man is entitled to hope and to see signs of hope. But his political analysis is unimpressive. While it's perfectly true that Castro has been terrible for Cuba, and there is undoubtedly a great deal of discontent, that doesn't mean Cuba will necessarily be free after the evil Castro dies. Even less does it mean that a free Cuba will last, or be either politically or economically successful.
The tyranny may simply have lasted too long and done too much damage to be reversed.
Thats according to the Trotskyites who still believe that, I think Lenin always saw it as his nation under his rule, with all the appearances of being something else, which the trotskys of the party thought.
Its also why Lenin referred to liberals in other countries as "useful idiots", he always wanted it to be a one man state, he just didn't want it to look that way.