I honestly don't care about the oil companies. I'll lead with that.
I'm not an American but my argument would be that a free and stable world is better for the US.
A regime like Iran's that has killed Americans, is openly calling the US "The Great Satan", is supporting militias in places like Iraq that attack Americans. That funds, supports and trains organizations the US considers terrorist organizations. Is abusing its own citizenry and actively seeks to export its values to other countries. Is supplying weapons to Russia for attacking Ukraine. This sort of regime can't just do whatever it wants under the label of "its own nation" since what its doing impacts others.
The US is the big superpower of the "west" and the "free world". For the most part it is its deterrence against Russia and China that is standing in the way of those doing whatever they want (e.g. China taking Taiwan by force). I don't think the world would be a better place if the US just stands back.
All that said, intervention, and use of force, needs to be sensible/reasonable/calculated. It's not easy to say where this is going. But it's also not easy to say where it would have gone otherwise. I can also understand Americans not having an appetite for any of this after Vietnam, Korea, Iraq, Afghanistan. But to contrast that I think failure to intervene in the Arab Spring led to pretty bad consequences, prolonged civil wars, a refugee crisis, etc. So perhaps some intervention and support would have helped. Also the US withdrawal and lack of support to democracy in Russia were probably factors in the reversal of that country back to where it is today.
Anyways, that's my very long opinion on this topic. But I can totally understand Americans not wanting any part of this. But don't think that you can just hide, things that happen in the world impact you.