The linked article says the US has threatened to reduce its support, not committed to leave. Things are bad enough without exaggerating like this.

Functionally, us not participating in defense coordination mechanisms is the equivalent of leaving NATO, as we would not be able to unify response.

By that logic, the European members who didn’t meet their defense spending obligations for years and years have already left NATO too.

That's the implication the administration is trying to force.

Basically, we are leaving Europe because we no longer have a commitment there and concentrate on Asia and the Americas.

This has been a stated policy objective of ours for almost 2 decades now.

I would follow the money. Which country is currently earning the most profits by selling weapons within NATO?

From a cursory glance, 2/3 of all arm exports towards NATO country is done by the US. Buying weapons from other NATO countries is a part of being a member in NATO.