because invariably they are based on bad logic, bad knowledge of history, or bad understanding of the capabilities of human beings.
also, it's not the real reason they can't do it - it's just suggestion on how to role play it in game. It doesn't tell us if it was actually intentional that advies can't emigrate (for example), or if is just that no one ever thought to include it (and we should go make a Feature Request)
It is completely unhelpful and usually doesn't answer the question
It is intentional. Its just one of the restrictions Tom places on Advies to make it clear they are different to nobles.
Also bad logic is generall subjective. To me it is bad logic to allow an advy to purchase a ship, but restrict access to cheaper more accessible purchases because of balance. In this case to me the logical thing would be to allow the balance case to rule, which then results in the purchase of ships being somewhat out of place within the game world.
