I haven't read all the way through this thread so forgive me if I'm posting something that's already been said!
Science should always be approached in a skeptical perspective, but at the same time, maintaining a "hopeful" one. Nothing in science is a given unless it's a law, up until it's proven...anything is possible.
My philosophy on religion and science is that you cannot use either of these to argue, say for example, "how we got here". That's an argument using apples and oranges. They are two totally different trains of thought. So a theologist debating existence (for example) with a scientist is a waste of time because neither persons' ideas can absolutely, without a doubt, be proven.
My answer to your question: NO. Whether you're a religious person or not, as a scientist, you shouldn't discount all that is possible.
Flat-out believing in everything that was written in the Bible (example) and trusting those who authored it, is the same scenario as being a scientist who is an atheist.
Personally, I think that science is a way of proving how God works (via laws, theories and facts), which supports some of what was written in the Good Book (discounting what was surely written out of current societal norms and other cultural "spiciness").
I'm thankful that God has given me the patience and intellect through what we call science to learn about the wonderful gift of this universe and the life He gave us.