Conflicts in Asia shouldn't be our problem, as an example. We should stop the US from dragging us into quagmires in the Middle East, etc etc.
What matters is that we have peace at home and the strength to preserve it. The rest shouldn't be up to us.
What happens when imperialism spreads near our borders, but not yet across them? Do we wait until the final moment to mobilize? That seems like horrible planning.
In the period between WW II and Iraq II, the USA used soft and military power to keep basic world order (country borders) and commerce running. It was the enforcer of the post-war Rules Based Order.
This was a good thing, that I believe we all took for granted. Even the USA has now taken that for granted. That historical period is now officially over.
What/who will fill that void of global stability?
France? That's not "we." The EU countries who really need a nuclear deterrent: Lithuania, Estonia, and Latvia do not have any MAD.
If the EU is invaded in those countries with traditional weapons, what will be our response? Certainly not MAD.