Everything is a concern. It's not often that humanity gets it right the first time, so the trick is to be ready to make changes when new verifiable data comes to light.
I understand the evolutionary underpinnings for it ( 'what I did got me this far did it not?' ), but it is still not a great excuse for a conscious being.
Yeah, it's not good to do that, but how is that related?
The "evolutionary underpinnings" are a sound rationale, not an excuse. Not for completely eschewing new information but being conservative in making changes.