BMR isn't even the best argument for you. The biggest difference in people regarding how easy they get fat/ripped isn't BMR which might be +- a couple of hundred calories/day, ie nothing. It's appetite, which is hugely based on genetics. Some people can eat 3k cals and feel like its nothing while others almost can't get it down. And that just means it a little harder for the first guy in my example, but still not even close to impossible to get shredded.
which is why I used genetics rather then just BMR. But are you saying every girl in the world can become a victoria secret model (as long as they have a pretty face of course).