Your list of cases can be paraphrased thus:
- Case 1: information known is incomplete, but sufficient.
- Case 2: information known is complete, and sufficient.
- Case 3: see case 1.
Yes, those cases are easy to handle, even on the spectrum.
Hard cases are where information is insufficient, and consequences of the decision are serious.
Neurotypicals (& ADDers) facing genuinely insufficient information often prefer a decision regardless - instead of admitting they cannot yet make a sound one. They prioritise impatience over correctness; short-term over long-term.
That bias is a factor in much social, environmental, and economic harm.