NATO would be less apt to assume they are in control without the US firmly in the club.
No doubt we would come to their aid
as deemed necessary by the situation at hand.
But with the US obligation gone to defend any and all, plus the lack of a major financier, NATO would shrink closer to its original mission (which seems to have been lost in time anyway...).
We, as a country, need to consider our true role in the world. Just like NATO.
Please seat yourself.
I like the very things you hate.