You are absolutely right. I missed this point in Max’s post.
If Putin is lucky and the winter in Germany turns out to be especially cold, or if some of their gas storage facilities suddenly explode for some strange reason (I really hope they guard them better than their railways), Germany might have to make serious concessions and lift some of the sanctions in order to start using NS2. Putin will announce this as a huge victory, since launching NS2 was doubtful even before the war.
That is exactly why Putin destroyed the other 3 pipelines. A simple resumption of the gas supply on NS1 would not have made it a big victory, because he himself had stopped it and it would not have been necessary to lift any sanctions to resume operation.
If you mean the massive strikes on civilian infrastructure, then no, even the complete destruction of said Ukrainian infrastructure will not significantly improve Russia’s chances in this war. This only creates hardship for the civilian population and increases the overall cost of aid to Ukraine for Western countries.
The Russian army has proven time and time again that it is incapable of attacking. Even in June, when the Russian army greatly outnumbered the Ukrainian army in artillery, and Ukraine was losing 300–500 soldiers a day, Russian troops advanced slowly and with huge losses.
One of the reasons is their complete inability to coordinate between artillery and infantry. The correct approach is to hit enemy defenses with artillery and attack immediately after the hit. They managed to repeatedly fail even this simple coordination exercise.
Recently, the Russian army even proved that it was not capable of organizing an effective defense. Yes, the mobilization will probably help with defense (with huge casualties), but it will hardly help with attack.
Even if only the military remain in Ukraine and the entire civilian population is killed or flees the destroyed cities, the Russian army will not be able to win.
I wouldn’t say that Ukraine has “irreversible momentum”, although it has an effective army that functions as it should. But it looks more like a complete lack of ability to achieve any momentum on the Russian side.