I think there is possible confusion here around "fight".
We haven't been using it literally, ie "boots on the ground" (and may it never have to be so 🙏)
An American and Iran conflict is so huge could affect the balances of power in many areas of the world, where it is of great diplomatic concern to our interests as well as possible provocation to armed conflicts that become our concern and ultimately, our fight.
But this is what Trump does. He disrupts, or threatens to disrupt.
It's his modus operandi, shown so colourfully last year in his tariff wars. Get everyone running around in a panic trying to appease, but end up not doing very much,
But meanwhile he is deliberately attempting to change the way countries relate to each other via International War and conventions, to try and benefit the USA
Except as Imaround and others point out, on the ground for huge groups of people in the USA it is not benefitting them at all, only the rich and powerful or key MAGA groups.