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  it casts the whole war as a situation that can cease anytime Russia wants it to by GTFO
  
  That's a huge part of it. The strategy employed gives them minimal propaganda to use on their population.
context: Just reading about the Bradley Fighting Vehicle... Russia has gotten itself into a complete morass. Just everything they bring to the field the rest of the world provides equal and opposite strength plus a bit more, bleeding them out.
  It's a fair argument that the restricted flow of equipment to Ukraine in one sense prolongs the fight but it casts the whole war as a situation that can cease anytime Russia wants it to by GTFO, which hopefully will mean a lasting peace.