Wargaming is not inherently flawed and can be quite useful. When they allow for outcomes that fly in the face of facts and reality they reveal their limitations when their rules allow for outcomes that are entirely unrealistic, but conform to the rules of the simulation.
Advancing through Siberia wouldn’t be a very tough logistical problem for Japan, it was flat out impossible outside of divine intervention. Japanese soldiers died to starvation over and over again in the Pacific due to their inability to keep them supplied. Advancing through the endless hundreds upon hundreds of miles of wastelands in Siberia before reaching anything of strategic value simply was not going to happen. The forces that crushed Japan in the border fighting of 1938/39 did not have tanks much better than what Japan had. At best they were T-26 and BT-5/7s and hardly so much superior to the Type 95 Ha-Gos the Japanese were using to qualify them as heavy tanks. There were no KVs in the border clashes or T-34s for that matter. The Soviets used plenty of Tankettes themselves both against Japan and Germany. Google T-27, T-37/38/40/60.
This occurred when the non-aggression treaty was signed long before Germany went to war with the USSR. The transfer of forces from the east to the west started from the beginning of the war.
This simply isn’t close to what would have happened, even in the best case for Japan. Japan would have forces facing them in hundreds upon hundreds of miles of tundra in a fight that vastly favored the defender. A minimal force would be all that was required to slow any Japanese advance to scarcely a crawl.
WW2 wasn’t a brushfire war like Vietnam was for the US. The USSR maintained the will to fight after losing millions of soldiers in 1941, and kept it up until the end of the war. Being a totalitarian dictatorship had its own advantages when it came to public opinion as well - although even the US or the UK never came even remotely close to losing the will to fight even in their darkest hours.
OK, I give. Minimal or even no resistance to an advance through Siberia would be so harsh that there would be no reason to even bother scorching the earth. There was simply nothing to burn in the first place. I’d advise taking a look at how badly Japan’s logistics actually were during the war. Relying upon ‘Churchill Rations’ (captured supplies) worked for a while in the 100 days after Japan went to war, but the folly of it became apparent pretty quickly. Take a look at Guadalcanal, Imphal/Kohema or any battle between the two. Japanese soldiers died to starvation by the thousands and resorted to cannibalism. Try to find a case where US or UK forces ate other human beings because their logistics were so wonderful that they lived off the land or captured supplies. Japan didn’t do this because they had superior logistics; they did it because their logistics were that horribly bad. Their soldiers dying to starvation was the outcome of it.
Utter tripe. Where to begin? 1) The forces from east of the Urals began moving West from June 22. They amounted to 400,000 transferred from all military districts west of the Urals, not just those in Manchuria facing Japan. 2) They were no better trained or ‘winter experts’ than the rest of the Red Army. 3) The transfer of all of 400,000 troops from East of the Urals from Jun 22 '41 to Dec 31 '41 amounted to 4% of what the USSR threw against Germany. 4) I hate to ask, but cite? Cite being for those magical Soviet soldiers from Siberia that turned the tide of the war by popping up in the Moscow area. Its not much more than a myth that passed into pop culture from World at War and such repeating it.