It would also give Russia every reason to completely dismantle the electric grid in Ukraine and flood Europe with millions of refugees.
And Russia is not trying to “completely dismantle” the Ukrainian electric system already? :)
Come on. If they could, they would. There is nothing to gain from incrementalism. Its been the same thing all along with Russian limitations, like the RuAF inability to achieve freedom to operate over Ukrainian airspace, or the Army’s failure to conduct operational maneuver, reducing them to 1917 tactics. None of this is deliberate, its what they are reduced to by their various incapacities.