I disagree. We're obligated to do things to the best of our ability based on the knowledge we have.
No, we're obligated to make sure we have enough knowledge and to gather more knowledge if we don't. If you believe that you don't have the time and/or resources to do this, that's also a decision with moral consequences.
In other words, it's not enough to merely try to make the correct decision.
You use only the resources you have, including your judgement, including your metajudgement.
Here's the new thread for posting quotes, with the usual rules: