Interesting. In many ways we are still in the dark ages of medicine (treating symptoms). In the future we will know the causes of asthma, and directly fix them.
I would argue that the dark ages of medicine were the dark ages. Yes, we might still be tilting at windmills in our battle with symptoms, but this is no dark ages, rife with misinformation, superstition and a complete lack of records.
Indeed. Our ignorance will invariably overshadow our knowledge, the universe is too vast and too complex for it to be otherwise. But we shouldn't let perfection be the enemy of good.