Biden did kind of the same. A few years ago he promised russia "devastating consequences if Navalny dies in prison". So Navalny did die in prison. What did Biden do? Right.
Yup. Promises and talking big works up until someone calls the bluff.
NATO in a certain way is based on that as well. If it fails a single test regarding article 5 after someone challenges it, it becomes instantly worthless.
The danger as I see it currently is that the West is tired of war and it’s an opportunity for Putin to challenge NATO. Attack a small village in a Baltic state. Are Americans and Germans and the British going to risk their lives for a small village in a Baltic country? I hope they would, but I realistically don’t see it. And that one non-response would make NATO worth less than the paper the agreement was printed on.