Think about it. The Russian industries were beyond the Urals, out of bombing range. They had a non aggression treaty with the Japanese. They had another whole army uncommitted to the conflict.
If Patton had gotten his war, we could not bomb the industrial area. They might come in on the side of the Japanese, and it has been suggested that they might invade Alaska with their uncommitted Army.
Using what for a Russian navy vs. the U.S. Pacific Fleet that had just defeated Japan?
Agreed that a land war in Europe would have been ugly.