The differences in coverage "is rooted in a gender stereotype: the assumption that people who have been assigned female at birth are supposed to have breasts, and that people assigned male at birth are not."

It's not a "gender stereotype." It's a biological fact.

"No doubt, the majority of those assigned female at birth have breasts, and the majority of those assigned male at birth do not. But we cannot mistake what is for what must be.”

Not just a "majority." It's a universal biological fact with a tiny number of exceptions.