What data would be against your "interest" as a US grad? That FMGs aren't incompetent? I'm not clear why that would make you feel threatened. Maybe I'm missing something...
You are missing a very big thing. It's called commoditization, and it should keep you awake at night.
Ok, listen to this example. I like the show Breaking Bad on AMC. It is about a hard luck but highly skilled high school chemist who turns to crime by cooking meth for the Mexican cartel.
This chemist turns out to be very good at meth-cooking, and cooks the purest meth ever. His talents are very much in demand, and he is paid millions by the cartel.
The chemist is assisted by a high school dropout/meth addict. The dropout is about as smart initially as you'd expect a dropout meth addict to be, but the chemist got his start in the crime business by working with the dropout, so there is some loyalty there. They are partners, and the cartel pays them both.
Eventually though, the chemist starts acting up, and the cartel is looking for a way to replace him. Now the chemist was the one who came up with the ingenious recipe for the drug in the first place, but the dropout has worked with him enough that he has the recipe down cold. That is all the cartel wants.
The chemist's genius and years of knowledge were valuable in that it helped him create the recipe. For awhile, he was the only one who could do it, and so he was paid handsomely and the cartel went to great lengths to protect him.
Now though, the all-important part of his knowledge has been commoditized, and passed on to the dropout. So now, instead of being rewarded and protected, the chemist has to fear for his and his family's life.
So when you hear stories and studies of PAs and CRNAs and NPs and FMGs all doing as good as job as you with your $500,000 degree and higher salary can do, you need to think of what happens to high-priced people who are no longer thought of as essential. Hint from the TV series: it involves getting driven out to the desert with a bag over your head by guys with guns.
You don't have to say that others are incompetent. But your motto needs to be that no one does it better than you, and you need to repeat that over and over and over for as long as you live.