Nukes are useless in current world. What for? To destroy cities? How it can help to win the war where you are the aggressor? Wipe out Kyiv - Ukrainians will not

Nukes are useless in current world. What for? To destroy cities? How it can help to win the war where you are the aggressor? Wipe out Kyiv - Ukrainians will not stop fighting. Target troops with nukes? Like to nuke every mile of the frontline? Either way more countries will oppose russia after use of nukes. Being a nuclear power also does not prevent war, as you can see what happens between India and Pakistan.