Avrah – they are two separate issues (at least in theory) – who goes to the shalom zachor and who they are made for.
On the one hand, it is possible for shalom zachors to be for boys but both men and women attend. On the other hand, it is possible for shalom zachors to be for both boys and girls but only men attend.
By the way, most women I know do attend Shalom zachors, although there are usally less women in attendance than men.
Also, that’s a very unusual thing to have in mind for שעשני כרצונו, so I don’t think it can be used as proof of anything. I hope she has other things in mind, and that was just a joke.