There's a lot of white things I don't agree with but obesity is hardly cookie cutter. It's based on sex, height, age which is not the same from person to person.
And while it's not perfect because there are very healthy people who are technically obese because of muscle mass, when it comes to fat, on a woman's smaller frame, even if it's well proportion that can still be very dangerous and stressful on her body.
Just because someone carries their weight well doesn't mean they are healthy. And that's not a choice anyway. Fat will go where it wants.