It make sense. russia's agenda is to destabilize Europe. And they were the only ones who had anything directly to gain from it with certainty as they wanted to create an energy crisis in Europe. They knew that after the EU sanctions, Nord stream would be a dead project after their illegal invasion. By blowing up what now had no real long term economic value, they created uncertainty and it helped to get the energy prices to skyrocket in Europe and they succeeded in their goal of destabilizing Europe's energy market. All the Russians want is to create as much havoc for the West they can and create conflicts and make west weak, just of that reason it make totally sense to blow it up.