I think he should have. I was recording a video* entitled "It's Halal Therefore It's Healthy?" and, as I was, I started thinking about this. If Muhammad was really sent by Allah then he should have known that alcohol has many uses besides being something to drink. He should have predicted that alcohol can be used to kill germs. Muhammad could have said: "alcohol is only forbidden if you drink it". But general consensus is that he did not.
Link to video:
Link to video: