Prostitution is Schroedinger's empowerment. When the hookers are significantly hotter than the feminist and drawing the attention of men she feels entitled to, their existence is oppressing women. When the hookers are mid women destroying their own lives by selling their butthole pictures for 50 cents apiece, and men are by and large contemptuous of their foolish life choices, they are making empowered choices, and "sex work is real work." Essentially, a feminist's approval of another woman's choices is largely a function of how damaging those choices at least appear to be (not that the attractive whores are actually making long-term good life choices; it's merely the appearance that matters to a feminist).
When a feminist says something is empowering, it has a shrewd double meaning. Women are prone to group think, so when The Sisterhood makes a decree like "fat is beautiful", no girl would dare go against it. This collective delusion gives all women a strategic advantage against all men in negotiations, since the insistence that fat is beautiful effectively makes it true by means of mass appeal fallacy. Even if you don't believe it yourself, if society considers a fat girl to be a 6, then a skinny girl must be at least a 7. There's no opposing force to similarly inflate men's Sexual Market Value.
But on the other side, it also serves as a way to control other women by means of deception. It's hoped that the more gullible members of the girl group will actually believe the lie, take it to heart, and start
acting like an entitled 9 when she is actually a 4
, which keeps her from being competitive against the high ranking females of the order. If a fat chick lost weight, or lowered her standards, or god forbid, both, she would become more desirable to men, which could catastrophically upset the power dynamics of The Sisterhood.
"Fat is beautiful" translation from woman to English: "You're not a 10, but please keep sabotaging yourself by acting like you are so you don't threaten my position in the hierarchy".