Distance does matter, the Atlantic ocean is less a problem in 1945 than 1980 (USSR had no nuke sub navy in 1945 to stink the US in north atlantic) but Western Europe in 1945 was a ruin, and ground logistic without any good ports would have been a major problem. The Allied bombed each and every road and railways... Logistic was a problem in 1944 when the Allied tried to push toward Germany, it would have been so worst for a push toward Moscow... Not speaking of communists partisans.