Do we really have to know what acid-base disturbance comes with furosemide usage or understand the pathophysiology of myotonic dystrophy?

Yes, you really do. There are more anesthetic considerations to myotonic dystrophy than simply avoid succinylcholine, and if that is news to you, sign up now... you need to enter the boards with a full breadth of knowledge, not just enough to skirt by anesthetizing healthy patients.