I respect Judith Butler – however, amicus Plato, sed magis amica veritas.
The claim that sexual differences, and the body generally, as well as agency or personhood, are “socially constructed” is incoherent and misleading. On the contrary, it seems virtually self-evident that sexual differences (and many other features of the body) are not social constructs.
A subsidiary thesis is that the mechanism by which social construction takes place is “power,” and that seems dubious as well. Surely a great deal of social construction takes the form of interactions that are entirely voluntary and mutually beneficial.