There are reflex finders, but they can be cumbersome, particularly as format size increases.
The inverted image is something one gets used to. It also makes it easier to see the composition of the image abstractly.
Try this exercise: pick up some albums of the work of your favorite LF photographers and read them upside down, or even better, you might use a mirror to see them upside down and reversed, though this can be a little awkward. I find this particularly interesting with Weston. His forms become much clearer that way. Someone ought to do an upside down exhibit of Weston.