I don’t think international relations is quite so basic as you make it out to be. I’ve read expert opinions months back already stating that the current rate of attrition would see Putin forced to negotiate sooner or later, but it’s hard to call just when. Maybe his willingness to enter talks now indicates desperation while trying to bluff strength still.

In any case, they’ve made a case for blocking tankers and increasing economic pressure. They’re not just looking to abandon Ukraine, simply advocating for ways that don’t involve exporting more weapons, which is why I think it’s not a matter of opposing goals, just disagreement on the means.