We Are Not Consistent

So I'm going into my fourth week of work at the Aquareana Center, and it is awesome. I spend 99.9% of my time outdoors. I drive glass bottom boats and tell people how cool the San Marcos Springs are.
The place used to be an amusement park, but it went bankrupt. Now the university owns it and has turned it into a research and educational center. They love to talk about preserving the environment and saving endangered species, which is great, but it's made me realize something:

Very few people in America truly believe in Evolution. Evolution is about survival of the fittest. The one with the best genes wins. But we don't like that. We try to preserve endangered species and environments, and believe it is bad when they perish. We spend time, money, effort, and love trying to treat those with severe handicaps. If we practiced what we preached, we would let animals go extinct, we would not concern ourselves with those weaker than us.