There is no way, none, that Picard’s blockade could possibly be effective, because space, as Douglas Adams reminded us, is big—really big. The Klingon Empire and Romulan Empire are two gigunda empires spanning many solar systems. It’s impossible to credit that there’s only one possible route between them. Interstellar space doesn’t have narrows or rivers or eddies or anything like that, it’s just really big. So why doesn’t Sela just go around the blockade?