Just a reminder that NATO troops have always been rallied by Washington and on top of that the US is the only country to have ever invoked article 5.
The European allies have put their money and more importantly blood into these conflicts.
Yes, we can all look at a geographical map and state that the USA is blessed geographically by being split by two oceans from anything major in the world and thus conclude that the US does not need Europeans to defend its borders.
In essence you're completely ignoring how US allies in form of NATO allowed US to thrive as the global military power by providing a deep web of support, logistics, bases, ports, intelligence and allowing the US to have a huge influence it has consistently leveraged for decades to its own benefit or needs. And that includes financial reasons (like buying US weaponry).
If US wants to pull out of NATO it is what it is, but this whole nonsense of NATO benefitting only the European allies when it's always Washington asking for other's blood and bases and logistics is just it: nonsense.
> US is the only country to have ever invoked article 5.
> https://en.wikipedia.org/wiki/North_Atlantic_Treaty
> Following the September 11 attacks, the Secretary General of NATO, George Robertson telephoned Colin Powell and said that declaring an Article 5 contingency would be a useful political statement for NATO to make. The United States indicated it had no interest in making such a request itself; however, it would not object to the council taking such action on its own.[55][56]