Yeah. The fit person isn't privileged. They are fit. The fat person is disadvantaged. Barring the fine print of exceptions of the handful of people with actual glandular disorders or whatever, if you are fat is not you not being privileged. It is you being fat. Unless you want to compare being fat to being born a skin color that is widely hated within the society being born into or other such actual social issues in which there is no level of agency that can negate the realities. AKA being privileged enough to eat yourself to royalty sized levels as being similar to being born in a starving country with a hated skin color or genitalia set