One doesn't really say fakie ollie fakie 5-0 either to be fair, just fakie 5-0 because that's what you do on that trick, a 5-0 while going fakie, the entire trick is considered fakie as a whole and so you don't have to touch the name. Whereas there wouldn't really be an equivalent for the crooked version, so then saying fakie ollie into switch crooks traditionally makes sense and is descriptive.