That is indeed a valid point. Unfortunately, most of biology can also be qualified of "soft science". I however expect that a new age is coming for medicine: the age of science (the real one, this time). We are already seeing the birth of sizable databases exploited by professional scientists, but this is still a very minor part of the research output, and the signal-to-noise ratio is currently dismal. Additionally, the progress of medicine is somewhat parallel to the progress of hard science. What is lacking the most, is solid data and the methods to collect them.