@nishav I don’t know of any designer comments, but this is one of those aspects of the game that is determined by balance and playability rather than pinpoint geographical accuracy. If there were more SZs in the Pacific, that side of the game would take longer, since more turns would be needed to move ships. It would also restrict strategic options, since, if there were more SZs to travel through, units would have less ability to threaten multiple areas from whatever position they are in.
All that to say, I get your point, and a geographically accurate map does have some appeal, but if you’re looking to play a balanced and fun game that doesn’t take up your whole week, the way they made it is well done.