PBA: That’s the way I’ve always learned it. I can’t say you’re wrong if you’re Machmir on this because there are Tzdadim L’hachmir, but the Tzdadim L’hakel are pretty overwhelming.
And I see your point about feminists wanting to do something not making it a Minhag. But I feel like there were always some women who counted with a Bracha and that since the reason for the M”B’s Minhag doesn’t really apply to most women nowadays, it’s very hard to be Moche a woman who wants to do a Mitzvah (especially because of the strange Lashon in one Rishon-I think it might be the Rosh-that the Bracha of S’firah is actually part of the Mitzvah), and certainly one like S’firas Ha’omer where there’s nothing public and she’s not rubbing it in anyone’s face.