As I said, America’s sending a bomber maybe two bombers to England for SBRing Germany.  That’s 2-12 damage + 16 damage from British bombers a round.  Germany’s going to town at McDonald’s with that kind of bombardment. (40 - 28 = 12 income.  50% of what Russia’s making a round.)
Meanwhile, Japan’s stalled at least a round, maybe 2 in Asia by strategic placements of British, American and Russian units.  they’ll make progress, but not as fast as they’d hope.
Yes, this means Brition is only buying bombers and infantry.  Or bombers and saving money.  So?  Germany can focus on Russia, but again, all Russia has to do is kill off 4-6 infantry a round and build more then 6 in order to tip the scales in their favor.
So we have Japan with 2 Battleships, 2 Carriers, 4 Fighters, 1 Transport on Japan 1.  America has 1 Battleship, 2 Destroyers, 2 Transports on America 1.
Japan spends round one getting transports to attack the mainland.  America builds fleet.  Round 2, Japan still goes for mainland, America moves fleet to Solomons, builds more fleet.  Japan gets nervous, builds fleet.  America builds more fleet, takes a valuable island group, moves fleet to Solomons.  Japan makes more fleet, starts to threaten America.  America consolidates fleet making strong point.  Japan can either destroy fleet at loss of their own, or consolidate.  America builds more fleet.  Meanwhile, Russia and Brition are getting aggressive on the mainland killing off forces because Japan cannot reinforce them while they are building fleet.
Japan and America earn almost the same.  Japan only has the advantage of 1 BB and 1 CV (40) vs America’s advantage of 2 Destroyers (24).  2 DD >/= 1 BB.  And if Japan hits pearl, they have a 2 carrier lead.  But if htey hit pearl too lightly, because of other actions, they might loose some lead.  It’s a toss up.  It’s not as sure as the destruction of Europe is, but it’s also not impossible.
You make it sound as if it is impossible.