Methinks the attack/defense is just more rhetoric from Putin’s regime to gloss over the real purpose — oppression of Russians. He is envious of China’s Great Firewall, not resiliency to cyber attack.
Russia has no hope of waging or defending an actual conventional hot war with the West. Something like this wouldn’t be used for anything less, b/c can’t really secure domestic internet from other intervention.
But an ability to filter information for domestic propaganda purposes? That’s a huge win for Putin.