The more you think about it, the better/worse it gets.
They couldn’t fly from Japan to Hawaii even using the more reasonable route. They were brought nearer using aircraft carriers.
The Doolittle Raid launched longer-range bombers from US carriers to hit Japan and they were lightened up to the max (dumped their guns and anything else non-essential) and planned from the get-go to ditch over China because flying back would be impossible.
Being able to fly a bomber halfway across the World was beyond WW2 tech.