Funny you should mention this. Let's address the claims....
bowhunter said:
Well, thousands of "real" scientists use to wash their hands in dirty water and couldn't figure out why their experiments failed in the death of the lab animal.
I'm not sure about the accuracy of this one. Where did you hear this?
Thousands of "real" scientists believed "bleeding" people would make their diseases go away.
Bloodletting, as it is more accurately called, is an ancient practice with unknown roots. However, it is fair to say it was never a scientific innovation. It was subsequently practiced for thousands of years. By the time scientific method began to take hold, bloodletting quickly fell out of favor, with few exceptions. So, scientists, in the modern sense of the word, have almost never condoned that ghastly procedure.
Thousands of "real" scientists believed the earth was flat.
About 600 BC or so, Greek thinkers (one cannot rightly call them scientists) accepted the spherical earth. In the third century BC, Eratosthenes estimated the circumference of the earth with surprising accuracy. Christians, however, and especially Christian leaders, often insisted the earth was flat at least until about 800 AD. It wasn't until 1100 or so that the Roman Catholic Church had predominantly accepted the spherical earth notion.
Guess what sonny, them there "real" scientists had inertia and opinion pushing them to their ultimate WRONGNESS. Just like these do. They can only see "evolution" in the lense they are looking through. Luckily, the polls show they are not having much impact on society.
You gave three horrible examples, but you are correct insofar as scientists are often wrong. The problem is, what alternative do we have? Look at evidence, and trust those who do the same. Scientific method is one of the greatest innovations humans have yet put forward. To reject it, in favor of "this book says so," or "this guy says so," betrays a foolishness too powerful to overcome. Fiat reasoning simply does not work.