I don’t think Newcomb’s Problem can easily be stated as a real (as opposed to a simply logical) problem.
It can be stated as real in any and every universe that happens to have an omniscient benefactor who is known to be truthful and prone to presenting such scenarios. It’s not real in any other situation. The benefit for optimising a decision making strategy to handle such things as the Newcomb problem is that it is a boundary case. If our decision making breaks down entirely at extreme cases then we can not trust it to be correct.
It can be stated as real in any and every universe that happens to have an omniscient benefactor who is known to be truthful and prone to presenting such scenarios. It’s not real in any other situation. The benefit for optimising a decision making strategy to handle such things as the Newcomb problem is that it is a boundary case. If our decision making breaks down entirely at extreme cases then we can not trust it to be correct.