If we're going to have an interventionist role, I do prefer it be of the form where we never actually intervene, because other states stay on their best behavior.
It's like hiring a big scary dude to work security, but having him under orders not to intervene. As long as potential malfeasors don't know he won't intervene, it's an effective deterrent.
I also don't mind Vivek's strategy, which is to use the current US overreach as negotiating leverage: i.e. we'll agree to stop funding and arming Ukraine, if you negotiate a peace settlement.