From an outsider standpoint it all seems so insane. The water is there — the way we do it in the world I know isn’t to have, say, Czechs slaughter Germans for decades until they get to the sea, in this case they made a deal to be part of a common market which makes it simple. But even in the absence of the EU etc. I still think they’d (at least in this century) negotiate for access to a convenient railroad, offer to pay to expand a port so both sides profit, etc.