If you were a rabbit Mooster mate, your ancesters going back 1000's of years, would have had to put up with all sorts weasles, stoats, polecats etc. coming into their burys to try to eat them! If your rabbit forefathers hadn't of figured out that more exits = more chance of staying uneaten, there's a very good chance that you wouldn't be alive today!
To be honest mate, the wild rabbit hasn't really been studied by scientists a hell of a lot. One of the only serious scientific field studies of rabbits, was carried out here in pembrokeshire, at a place called Orielton, at a place called The