While you are lecturing me on words meanings, I would advise you to look up the meaning of "de facto."
If you were America's founding fathers and King George 3, the leader of their government, decided to put a 10000% tariff on goods meant for the colonies, do you think they would have felt blockaded?
No amount of tariffs makes a blockade. De facto blockade would mean that you can't trade with anyone.
But I give you something. US can de facto blockade itself by raising tariffs for everyone.
blockade, embargo, sanction, tariff. Each are different and have different meaning.