I'm going to keep asking the question,why no ceasefire?
Worthwhile don't you think?
I (and others) have already answered the question. 1) Because Ukraine and Russia are too far apart to mutually agree to one. 2) Because there is no external authority with the power to compel them to adhere to a ceasefire, particularly given the presence of a very large number of nuclear weapons on Russia's side of the ledger.
If you grow up in the West, you're used to living in a world where authority figures can escalate things up the chain to ever-greater levels of force to keep people in line. If you punch a schoolteacher, the police get called. If you hole up somewhere and put lives in clear and present danger, the police use a much greater level of force to sort you. If you have a whole cult resisting the police, they break out the tanks (eg: Waco). If an entire state resists the national government, we have civil war.
The international system has none of that. It has courts, but to be forced to appear one has to lose a domestic power struggle or catastrophically lose a war. The international system has armies, but no one wants World War III. Imagine your city as a place where the police can't make an arrest without the unanimous consent of the mayor and the city council, they aren't allowed to arrest the mayor or the city council even if they shoot someone dead on Fifth Avenue, and every one of those officials has pet constituencies that they protect in order to get re-elected. It's a largely lawless mess with very inconsistent rules enforcement, right?
Well, that's the international system for you.