Which is a totally reasonable posture, for a nuclear deterrent. I don't begrudge Putin that, though it's generally not considered necessary to actually say it. Everyone already understands the existential use of nukes.
I'm saying Putin is likely to go much further than that, and use nukes against Ukraine if it looks like they're winning, even if they don't represent an existential threat to Russia.
In fact I'm saying that's by far the most likely use of nukes scenario right now. I don't think anything else going on at the moment even comes close. Certainly not dudalb's India/Pakistan hallucination.