The more one thinks about it, the more it would appear that a prolonged war may actually play into NATO's hands in one sense.
If Ukrainian losses can be minimised - Russia continues to pour manpower and military resources into the meatgrinder, without making any discernable progress.
It's military thus becomes weaker and weaker, more and more degraded the longer the conflict persists.
It rapidly runs out of human bodies to thrown into the conflict.
Even a pukka general mobilisation wouldn't serve any purpose.
Can it lift industrial production, innovate and produce new game changing weaponry (or import it)?
Alone it would appear not, it's constrained by sanctions and it has few friends with the capabilities.
Thus the strategy becomes, use the Ukrainians to utterly bleed Russian dry militarily.