It's not really a nuke as some processes might be protected. The nuke is to use debugger privileges. Far Manager can kill processes using debugger privileges, that will literally nuke anything and in an instant: the app won't even receive any signals or anything.
The end task doesn't terminate the app, it only sends a message to the window to close itself. The app will then decide what to do on its own. For example, if the app has multiple windows open, it might close the active one, but still continue running with other windows open. Or it might ignore the message completely.
That's called rare in Britain and it's safe to eat. Raw is safe too. Also raw pork and venison is safe. As well as eggs and milk. High food quality standards we have.
It doesn't matter as it doesn't hurt anyone in any way, shape or form.