That's the problem though , that thinking is the reason why Europe doesn't have a proper independent defence capability, it's so 1950s frame of mind. The fact that Europe could not stay in Afghanistan without the US is deeply concerning. The French were always in favour of an independent capability independent of the U.S. , the British always dragged their heels on this because they couldn't countenance a European defence without the U.S.
I think NATO as it stands is only applicable to big threats from China and Russia that involves nuclear weapons, every other conflict on Europe's borders will become Europe's problem to solve that's the change that's coming.