Although the Germans were falling back in defeat, this did not mean they would give up resistance.
On the contrary, in order to protect their native land from being counterattacked, Germany would become even more aggressive in defense and even more indifferent to casualties.
This also meant that to overcome the German defenses, a higher number of casualties must be incurred. For all the countries currently involved in the counterattack against Germany, personnel casualties were precisely the most fatal aspect.
In other words, the more a country cared about the benefits gained from occupying Germany, the more effort they must put into the occupation.
And the more effort put into occupying Germany, the more personnel casualties must be assumed.
That is precisely why the United Kingdom and Australasia were all too pleased to see France's massive reconquest of territories and Russia Nation's counteroffensive plans.