Why are you concerned with long-term reduction of Russian war-faring capability? How is that relevant to this situation?
If I believe that would help, I would only be concerned with their immediate reduction of war-faring capability and replacement of their government with a more reasonable one, but none of that seems likely to be achieved with sanctions. And I hope we are not in this for the long run, because I am pretty confident Russian army can keep this up for a number of years.
FWIW, I would hope for the same in regards to all the countries in the world: for their governments to be more reasonable, to do less lying, and to start no wars.