Because context is a thing. Or do you think Russia would currently accept any peace deal that includes leaving Ukraine? Of course there will have to be a peace deal at the end, but currently there are no peace deals that would be acceptable to either party.

When there is talk about “peace deals”, such deals are implied to somewhat reflect the status quo border wise, which at the moment would mean that Ukraine surrenders. It’s Russia currently occupying Ukraine and trying to legitimise it, not the other way around. No shit a peace deal would be favourable to them.