Yes, it might not be perfect and some studies are biased or plain wrong, but it's still much more reliable than anything else (say: dogmas, opinions, first-hand impressions, etc.). Science as a method of knowlegde is clearly reliable. We also tend to label scientific discoveries or teories as science themselves, but the primary meaning of the word still refers to the method by which such conclusions are achieved. Even if we may draw some unaccurate or wrong conclusions using that method, the great thing about science is that it corrects itself over time again and again, until truth is discovered.
Science may be based on logical thinking, there is always a place for human biais. Think about the earth. The belief is that religious people back in the middle ages supported geocentrism, which place the earth at the center of the universe. This was actually proposed by ancient Greek scientists. We have nights and days so it would be logic that the sun would go around the earth and thus having one side where it is day and one side for night which change all the time. This was observed and those scientists confirmed their hypothesis. But then came Galileo who put that theory to test and realized through observation that they were wrong. The sun would be at center of the universe and the planets turning around it. But guess what: he was wrong too! Although it is (at least assumed to be) true that the planet turn around the sun, the sun is not at the centre of the universe. It is only a