The nuance here is that it's not the diplomats saving the peace (they obviously can't make such offer on their own), it's the NATO countries dramatically changi

The nuance here is that it's not the diplomats saving the peace (they obviously can't make such offer on their own), it's the NATO countries dramatically changing their strategic posture (willing to become economic vassals) and diplomats communicating the change. Putin would likely agree to such proposal since it would still further his goal of Russia becoming a dominant power on the continent. This nuance is important, because sometimes people blame "weak diplomats" etc, but it's not their fault, they can't find equilibrium of strategic interests where there's none.