The resources take part in that thing we call strategy, crazy. But even so, if 1942 would have started with Moscow in German hands and a thick front line, without a Western front then the remains of the USSR could not have launched decisive counter attacks until, let's say, mid 1943 and even then it would have been enormously difficult to fight the Wehrmacht with full resources of all over Europe.

__________________
"War is less costly than servitude, the choice is always between Verdun and Dachau." - Jean Dutourd, French veteran of both world wars

"A mon fils: depuis que tes yeux sont fermes les miens n’ont cessé de pleurir." - Mère française, Verdun