“Nothing will prevent that from occurring.”
Really? So what’s prevented it from happening so far?
Russia's desire to go slow to save its own troops' lives and grind weakened the Ukrainian military to the point a major offensive is much easier.
You don't seem grasp what is going on -- the Russian strategy for the past year and a half has been to destroy the Ukrainian military, not gain territory.
But, the bet you made and lost with me proves you're objective or rational when it comes to what is occurring on the battlefield.