Relevant quote from Morality as Fixed Computation:

But the key notion is the idea that what we name by 'right' is a fixed question, or perhaps a fixed framework. We can encounter moral arguments that modify our terminal values, and even encounter moral arguments that modify what we count as a moral argument; nonetheless, it all grows out of a particular starting point. We do not experience ourselves as embodying the question "What will I decide to do?" which would be a Type 2 calculator; anything we decided would thereby become right. We experience ourselves as asking the embodied question: "What will save my friends, and my people, from getting hurt? How can we all have more fun? ..." where the "..." is around a thousand other things.

So 'I should X' does not mean that I would attempt to X were I fully informed.