Lake Superior has the same surface area as the entire country of Austria. It even has its own climate systems. Hell yes it should count, let alone the entire lake set. They're more like inland freshwater seas.
And don't they drain through navigable rivers all the way to the ocean? To me, landlocked means you can't get on a boat and sail off to become a pirate. 🦜🏴☠️
I did forget about it! I hear overlooking Niagara Falls is a fun thing to do. Or underlooking it. I guess sailing over it would be one way to get your pirate peg-leg, if you lived.