That is one weird argument, the actress' daily wear shouldn't be taken as the standard of a movie costume.(The same applies to musician/singers not willing to wear the same costume they don in an MV. It's totally valid, because they are different media with different exposure.)
Hey, this person wears a revealing swimsuit on a beach, on hot weather, etc, so she should be totally fine with it in a movie that will be watched by billions of people? Especially later you are the only one with that treatment?(Well, Wanda is always the exception lol.)
Also I would say WV's final costume is pretty feminine, so who cares, the end results are good and the actress is more comfortable.